Lesson 15.2: AM, PM, and Calculating Elapsed Time
Distinguish morning (AM) from afternoon/evening (PM) and calculate elapsed duration between two events.
⏱️ Reading Time: 15 mins
• ❓ 50 Interactive Practice Questions
🌟
Real-Life Story: Time and Clocks
A community football match kicks off at 3:15 PM and ends at 4:45 PM. By calculating the difference between start and finish times, the referee confirms the event lasted 1 hour and 30 minutes.
💡 Core Mathematical Concepts: AM/PM & Elapsed Time
Focus areas: AM, PM, noon, midnight, elapsed time, duration.
| Concept / Term | Mathematical Definition | Everyday Example |
|---|---|---|
| AM (Ante Meridiem) | Time from midnight (12:00 AM) to just before noon (11:59 AM) | Breakfast at 7:30 AM |
| PM (Post Meridiem) | Time from noon (12:00 PM) to just before midnight (11:59 PM) | Dinner at 7:00 PM |
| Elapsed Time | The total amount of time that passes from the start of an event to its end | From 2:00 PM to 3:30 PM is 1 hour 30 minutes |
| 60 Minutes in 1 Hour | 60 seconds = 1 minute; 60 minutes = 1 hour; 24 hours = 1 full day | 1 h 15 min = 75 minutes |
🔍 Practical Classroom & Everyday Examples
Example 1: Bridging the Hour for Elapsed Time
Break elapsed time into manageable chunks: count to the next full hour, then add the remaining minutes.
Example 2: Converting Hours to Minutes
Multiply number of hours by 60 and add leftover minutes (2 hours 10 minutes = 120 + 10 = 130 minutes).
⚠️ Watch Out! Common Mistakes to Avoid
Common Error: Calling 12:00 in the middle of the day 12:00 AM
Correction: 12:00 daytime is 12:00 PM (noon). 12:00 night is 12:00 AM (midnight).
Common Error: Subtracting time like normal base-10 decimals
Correction: Time uses base 60 for minutes, not base 100! 4:10 minus 3:50 is 20 minutes, not 60 minutes.
🎯 Quick Self-Check Challenge
A train leaves Central Station at 10:40 AM and arrives at Coastal Town at 1:15 PM. How long was the journey?
Answer & Explanation:
From 10:40 AM to 11:00 AM is 20 min. From 11:00 AM to 1:00 PM is 2 hours. From 1:00 PM to 1:15 PM is 15 min. Total: 2 hours and 35 minutes.
🎯 Key Learning Takeaways
Master Time and Clocks fundamentals.
📄 Printable Worksheets (5 Available)
Download ready-to-print PDFs for offline student practice with separate parent/teacher answer keys.
G3-M-CH15-WS05
A4 • 15 Qs
Time and Clocks — Worksheet 5
Analog & Digital Clocks, AM/PM & Elapsed Time (Evening Music Concert)
G3-M-CH15-WS04
A4 • 15 Qs
Time and Clocks — Worksheet 4
Analog & Digital Clocks, AM/PM & Elapsed Time (Library Reading Club)
G3-M-CH15-WS03
A4 • 15 Qs
Time and Clocks — Worksheet 3
Analog & Digital Clocks, AM/PM & Elapsed Time (Sports Day Championship)
G3-M-CH15-WS02
A4 • 15 Qs
Time and Clocks — Worksheet 2
Analog & Digital Clocks, AM/PM & Elapsed Time (Science Museum Tour)
G3-M-CH15-WS01
A4 • 15 Qs
Time and Clocks — Worksheet 1
Analog & Digital Clocks, AM/PM & Elapsed Time (Morning School Routine)
✍️ Lesson Practice Questions (50 Questions)
Solve these real-world challenges online, test your understanding, and reveal instant step-by-step explanations.
1
Short Answer
Hard
2 Marks
A runner completes 4 laps of a track. Each lap takes 2 minutes and 45 seconds. What is the runner's total time in minutes and seconds?
A
11 minutes 0 seconds
B
10 minutes 45 seconds
C
11 minutes 30 seconds
D
10 minutes 30 seconds
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
11 minutes 0 seconds
Step-by-Step Explanation:
4 × 2 min = 8 min. 4 × 45 s = 180 s = 3 min. 8 min + 3 min = 11 minutes 0 seconds.
2
Short Answer
Hard
2 Marks
An airplane takes off at 11:45 AM on a flight lasting 3 hours and 35 minutes. At what time does it land?
A
3:20 PM
B
3:10 PM
C
2:50 PM
D
3:30 PM
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3:20 PM
Step-by-Step Explanation:
11:45 AM + 15 min = 12:00 PM. Remaining time: 3 hours 20 minutes. 12:00 PM + 3 h 20 min = 3:20 PM.
3
Short Answer
Hard
2 Marks
If the time is exactly 9:00 AM, what is the angle formed between the hour hand and the minute hand?
A
A right angle (90°)
B
An acute angle (45°)
C
An obtuse angle (120°)
D
A straight angle (180°)
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
A right angle (90°)
Step-by-Step Explanation:
At 9:00, the minute hand points to 12 and the hour hand to 9, creating an exact 90° right angle.
4
Short Answer
Hard
2 Marks
Why does an analog clock's minute hand move 12 times faster than its hour hand?
A
The minute hand makes a full circle (60 min) in 1 hour, while the hour hand takes 12 hours to complete a circle
B
The minute hand is physically longer
C
The clock gears only turn during the day
D
Because there are 24 hours in a day
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
The minute hand makes a full circle (60 min) in 1 hour, while the hour hand takes 12 hours to complete a circle
Step-by-Step Explanation:
In 1 hour, the minute hand travels 360° while the hour hand travels 30° (360 ÷ 30 = 12 times faster).
5
Short Answer
Medium
1 Mark
Zoe calculates the duration between 1:50 PM and 2:10 PM as 60 minutes because 50 + 10 = 60. What is the actual elapsed time?
A
20 minutes
B
30 minutes
C
15 minutes
D
40 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
20 minutes
Step-by-Step Explanation:
From 1:50 to 2:00 is 10 minutes. From 2:00 to 2:10 is 10 minutes. 10 + 10 = 20 minutes.
6
Short Answer
Medium
1 Mark
Sam says: 'The clock shows 15 minutes before 7, so the digital time is 7:45.' What is Sam's error?
A
15 minutes before 7 means 6:45, not 7:45
B
15 minutes before 7 means 7:15
C
Quarter to 7 means 7:30
D
Digital clocks cannot show 45 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
15 minutes before 7 means 6:45, not 7:45
Step-by-Step Explanation:
15 minutes before 7 is in the 6 o'clock hour (6:45). 7:45 is quarter to 8.
7
Fill in the Blanks
Medium
1 Mark
Start time: 9:15 AM. Elapsed time: 1 hour 40 minutes. End time: [ ? ]
A
10:55 AM
B
10:45 AM
C
11:05 AM
D
11:15 AM
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
10:55 AM
Step-by-Step Explanation:
9:15 + 1 hour = 10:15. 10:15 + 40 minutes = 10:55 AM.
8
Fill in the Blanks
Medium
1 Mark
Find the missing value: 2 hours and [ ? ] minutes = 145 minutes.
A
25 minutes
B
15 minutes
C
35 minutes
D
45 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
25 minutes
Step-by-Step Explanation:
2 hours = 120 minutes. 145 - 120 = 25 minutes.
9
Short Answer
Medium
1 Mark
A movie starts at 6:15 PM and ends at 8:30 PM. What was the total running time of the movie?
A
2 hours 15 minutes
B
2 hours 30 minutes
C
1 hour 45 minutes
D
2 hours 45 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
2 hours 15 minutes
Step-by-Step Explanation:
From 6:15 to 8:15 is 2 hours. From 8:15 to 8:30 is 15 minutes. Total = 2 hours 15 minutes.
10
Short Answer
Medium
1 Mark
Liam begins doing his homework at 4:35 PM and finishes at 5:20 PM. How long did he spend on his homework?
A
45 minutes
B
50 minutes
C
40 minutes
D
55 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
45 minutes
Step-by-Step Explanation:
From 4:35 to 5:00 is 25 minutes. From 5:00 to 5:20 is 20 minutes. 25 + 20 = 45 minutes.
11
Short Answer
Medium
1 Mark
At the Evening Music Concert, an event starts at 6:10 and lasts for 80 minutes. What time does it conclude?
A
7:30
B
7:35
C
6:30
D
7:20
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
7:30
Step-by-Step Explanation:
6:10 + 80 minutes = 7:30.
12
Multiple Choice
Easy
1 Mark
Convert 80 minutes into hours and minutes:
A
1 hour 20 minutes
B
2 hour 20 minutes
C
1 hour 30 minutes
D
0 hours 80 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
1 hour 20 minutes
Step-by-Step Explanation:
80 minutes = 1 hour and 20 minutes.
13
Multiple Choice
Easy
1 Mark
How many seconds are in 5 minutes?
A
300 seconds
B
250 seconds
C
350 seconds
D
150 seconds
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
300 seconds
Step-by-Step Explanation:
5 minutes × 60 seconds/minute = 300 seconds.
14
Multiple Choice
Easy
1 Mark
If the minute hand points to 8 on an analog clock, how many minutes past the hour does it show?
A
40 minutes
B
35 minutes
C
45 minutes
D
8 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
40 minutes
Step-by-Step Explanation:
Each number represents 5 minutes: 8 × 5 = 40 minutes.
15
Multiple Choice
Easy
1 Mark
How many minutes are there in 3 hours?
A
180 minutes
B
150 minutes
C
200 minutes
D
120 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
180 minutes
Step-by-Step Explanation:
3 hours × 60 minutes/hour = 180 minutes.
16
Short Answer
Hard
2 Marks
A runner completes 4 laps of a track. Each lap takes 2 minutes and 45 seconds. What is the runner's total time in minutes and seconds?
A
11 minutes 0 seconds
B
10 minutes 45 seconds
C
11 minutes 30 seconds
D
10 minutes 30 seconds
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
11 minutes 0 seconds
Step-by-Step Explanation:
4 × 2 min = 8 min. 4 × 45 s = 180 s = 3 min. 8 min + 3 min = 11 minutes 0 seconds.
17
Short Answer
Hard
2 Marks
An airplane takes off at 11:45 AM on a flight lasting 3 hours and 35 minutes. At what time does it land?
A
3:20 PM
B
3:10 PM
C
2:50 PM
D
3:30 PM
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3:20 PM
Step-by-Step Explanation:
11:45 AM + 15 min = 12:00 PM. Remaining time: 3 hours 20 minutes. 12:00 PM + 3 h 20 min = 3:20 PM.
18
Short Answer
Hard
2 Marks
If the time is exactly 9:00 AM, what is the angle formed between the hour hand and the minute hand?
A
A right angle (90°)
B
An acute angle (45°)
C
An obtuse angle (120°)
D
A straight angle (180°)
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
A right angle (90°)
Step-by-Step Explanation:
At 9:00, the minute hand points to 12 and the hour hand to 9, creating an exact 90° right angle.
19
Short Answer
Hard
2 Marks
Why does an analog clock's minute hand move 12 times faster than its hour hand?
A
The minute hand makes a full circle (60 min) in 1 hour, while the hour hand takes 12 hours to complete a circle
B
The minute hand is physically longer
C
The clock gears only turn during the day
D
Because there are 24 hours in a day
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
The minute hand makes a full circle (60 min) in 1 hour, while the hour hand takes 12 hours to complete a circle
Step-by-Step Explanation:
In 1 hour, the minute hand travels 360° while the hour hand travels 30° (360 ÷ 30 = 12 times faster).
20
Short Answer
Medium
1 Mark
Zoe calculates the duration between 1:50 PM and 2:10 PM as 60 minutes because 50 + 10 = 60. What is the actual elapsed time?
A
20 minutes
B
30 minutes
C
15 minutes
D
40 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
20 minutes
Step-by-Step Explanation:
From 1:50 to 2:00 is 10 minutes. From 2:00 to 2:10 is 10 minutes. 10 + 10 = 20 minutes.
21
Short Answer
Medium
1 Mark
Sam says: 'The clock shows 15 minutes before 7, so the digital time is 7:45.' What is Sam's error?
A
15 minutes before 7 means 6:45, not 7:45
B
15 minutes before 7 means 7:15
C
Quarter to 7 means 7:30
D
Digital clocks cannot show 45 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
15 minutes before 7 means 6:45, not 7:45
Step-by-Step Explanation:
15 minutes before 7 is in the 6 o'clock hour (6:45). 7:45 is quarter to 8.
22
Fill in the Blanks
Medium
1 Mark
Start time: 9:15 AM. Elapsed time: 1 hour 40 minutes. End time: [ ? ]
A
10:55 AM
B
10:45 AM
C
11:05 AM
D
11:15 AM
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
10:55 AM
Step-by-Step Explanation:
9:15 + 1 hour = 10:15. 10:15 + 40 minutes = 10:55 AM.
23
Fill in the Blanks
Medium
1 Mark
Find the missing value: 2 hours and [ ? ] minutes = 145 minutes.
A
25 minutes
B
15 minutes
C
35 minutes
D
45 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
25 minutes
Step-by-Step Explanation:
2 hours = 120 minutes. 145 - 120 = 25 minutes.
24
Short Answer
Medium
1 Mark
A movie starts at 6:15 PM and ends at 8:30 PM. What was the total running time of the movie?
A
2 hours 15 minutes
B
2 hours 30 minutes
C
1 hour 45 minutes
D
2 hours 45 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
2 hours 15 minutes
Step-by-Step Explanation:
From 6:15 to 8:15 is 2 hours. From 8:15 to 8:30 is 15 minutes. Total = 2 hours 15 minutes.
25
Short Answer
Medium
1 Mark
Liam begins doing his homework at 4:35 PM and finishes at 5:20 PM. How long did he spend on his homework?
A
45 minutes
B
50 minutes
C
40 minutes
D
55 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
45 minutes
Step-by-Step Explanation:
From 4:35 to 5:00 is 25 minutes. From 5:00 to 5:20 is 20 minutes. 25 + 20 = 45 minutes.
26
Short Answer
Medium
1 Mark
At the Library Reading Club, an event starts at 3:20 and lasts for 50 minutes. What time does it conclude?
A
4:10
B
4:15
C
3:10
D
4:00
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
4:10
Step-by-Step Explanation:
3:20 + 50 minutes = 4:10.
27
Multiple Choice
Easy
1 Mark
Convert 50 minutes into hours and minutes:
A
0 hour 50 minutes
B
1 hour 50 minutes
C
0 hour 60 minutes
D
0 hours 50 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
0 hour 50 minutes
Step-by-Step Explanation:
50 minutes = 0 hour and 50 minutes.
28
Multiple Choice
Easy
1 Mark
How many seconds are in 5 minutes?
A
300 seconds
B
250 seconds
C
350 seconds
D
150 seconds
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
300 seconds
Step-by-Step Explanation:
5 minutes × 60 seconds/minute = 300 seconds.
29
Multiple Choice
Easy
1 Mark
If the minute hand points to 8 on an analog clock, how many minutes past the hour does it show?
A
40 minutes
B
35 minutes
C
45 minutes
D
8 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
40 minutes
Step-by-Step Explanation:
Each number represents 5 minutes: 8 × 5 = 40 minutes.
30
Multiple Choice
Easy
1 Mark
How many minutes are there in 3 hours?
A
180 minutes
B
150 minutes
C
200 minutes
D
120 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
180 minutes
Step-by-Step Explanation:
3 hours × 60 minutes/hour = 180 minutes.
31
Short Answer
Hard
2 Marks
A runner completes 4 laps of a track. Each lap takes 2 minutes and 45 seconds. What is the runner's total time in minutes and seconds?
A
11 minutes 0 seconds
B
10 minutes 45 seconds
C
11 minutes 30 seconds
D
10 minutes 30 seconds
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
11 minutes 0 seconds
Step-by-Step Explanation:
4 × 2 min = 8 min. 4 × 45 s = 180 s = 3 min. 8 min + 3 min = 11 minutes 0 seconds.
32
Short Answer
Hard
2 Marks
An airplane takes off at 11:45 AM on a flight lasting 3 hours and 35 minutes. At what time does it land?
A
3:20 PM
B
3:10 PM
C
2:50 PM
D
3:30 PM
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3:20 PM
Step-by-Step Explanation:
11:45 AM + 15 min = 12:00 PM. Remaining time: 3 hours 20 minutes. 12:00 PM + 3 h 20 min = 3:20 PM.
33
Short Answer
Hard
2 Marks
If the time is exactly 9:00 AM, what is the angle formed between the hour hand and the minute hand?
A
A right angle (90°)
B
An acute angle (45°)
C
An obtuse angle (120°)
D
A straight angle (180°)
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
A right angle (90°)
Step-by-Step Explanation:
At 9:00, the minute hand points to 12 and the hour hand to 9, creating an exact 90° right angle.
34
Short Answer
Hard
2 Marks
Why does an analog clock's minute hand move 12 times faster than its hour hand?
A
The minute hand makes a full circle (60 min) in 1 hour, while the hour hand takes 12 hours to complete a circle
B
The minute hand is physically longer
C
The clock gears only turn during the day
D
Because there are 24 hours in a day
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
The minute hand makes a full circle (60 min) in 1 hour, while the hour hand takes 12 hours to complete a circle
Step-by-Step Explanation:
In 1 hour, the minute hand travels 360° while the hour hand travels 30° (360 ÷ 30 = 12 times faster).
35
Short Answer
Medium
1 Mark
Zoe calculates the duration between 1:50 PM and 2:10 PM as 60 minutes because 50 + 10 = 60. What is the actual elapsed time?
A
20 minutes
B
30 minutes
C
15 minutes
D
40 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
20 minutes
Step-by-Step Explanation:
From 1:50 to 2:00 is 10 minutes. From 2:00 to 2:10 is 10 minutes. 10 + 10 = 20 minutes.
36
Short Answer
Medium
1 Mark
Sam says: 'The clock shows 15 minutes before 7, so the digital time is 7:45.' What is Sam's error?
A
15 minutes before 7 means 6:45, not 7:45
B
15 minutes before 7 means 7:15
C
Quarter to 7 means 7:30
D
Digital clocks cannot show 45 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
15 minutes before 7 means 6:45, not 7:45
Step-by-Step Explanation:
15 minutes before 7 is in the 6 o'clock hour (6:45). 7:45 is quarter to 8.
37
Fill in the Blanks
Medium
1 Mark
Start time: 9:15 AM. Elapsed time: 1 hour 40 minutes. End time: [ ? ]
A
10:55 AM
B
10:45 AM
C
11:05 AM
D
11:15 AM
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
10:55 AM
Step-by-Step Explanation:
9:15 + 1 hour = 10:15. 10:15 + 40 minutes = 10:55 AM.
38
Fill in the Blanks
Medium
1 Mark
Find the missing value: 2 hours and [ ? ] minutes = 145 minutes.
A
25 minutes
B
15 minutes
C
35 minutes
D
45 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
25 minutes
Step-by-Step Explanation:
2 hours = 120 minutes. 145 - 120 = 25 minutes.
39
Short Answer
Medium
1 Mark
A movie starts at 6:15 PM and ends at 8:30 PM. What was the total running time of the movie?
A
2 hours 15 minutes
B
2 hours 30 minutes
C
1 hour 45 minutes
D
2 hours 45 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
2 hours 15 minutes
Step-by-Step Explanation:
From 6:15 to 8:15 is 2 hours. From 8:15 to 8:30 is 15 minutes. Total = 2 hours 15 minutes.
40
Short Answer
Medium
1 Mark
Liam begins doing his homework at 4:35 PM and finishes at 5:20 PM. How long did he spend on his homework?
A
45 minutes
B
50 minutes
C
40 minutes
D
55 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
45 minutes
Step-by-Step Explanation:
From 4:35 to 5:00 is 25 minutes. From 5:00 to 5:20 is 20 minutes. 25 + 20 = 45 minutes.
41
Short Answer
Medium
1 Mark
At the Sports Day Championship, an event starts at 1:45 and lasts for 75 minutes. What time does it conclude?
A
3:00
B
3:05
C
2:00
D
3:-10
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3:00
Step-by-Step Explanation:
1:45 + 75 minutes = 3:00.
42
Multiple Choice
Easy
1 Mark
Convert 75 minutes into hours and minutes:
A
1 hour 15 minutes
B
2 hour 15 minutes
C
1 hour 25 minutes
D
0 hours 75 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
1 hour 15 minutes
Step-by-Step Explanation:
75 minutes = 1 hour and 15 minutes.
43
Multiple Choice
Easy
1 Mark
How many seconds are in 5 minutes?
A
300 seconds
B
250 seconds
C
350 seconds
D
150 seconds
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
300 seconds
Step-by-Step Explanation:
5 minutes × 60 seconds/minute = 300 seconds.
44
Multiple Choice
Easy
1 Mark
If the minute hand points to 8 on an analog clock, how many minutes past the hour does it show?
A
40 minutes
B
35 minutes
C
45 minutes
D
8 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
40 minutes
Step-by-Step Explanation:
Each number represents 5 minutes: 8 × 5 = 40 minutes.
45
Multiple Choice
Easy
1 Mark
How many minutes are there in 3 hours?
A
180 minutes
B
150 minutes
C
200 minutes
D
120 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
180 minutes
Step-by-Step Explanation:
3 hours × 60 minutes/hour = 180 minutes.
46
Short Answer
Hard
2 Marks
A runner completes 4 laps of a track. Each lap takes 2 minutes and 45 seconds. What is the runner's total time in minutes and seconds?
A
11 minutes 0 seconds
B
10 minutes 45 seconds
C
11 minutes 30 seconds
D
10 minutes 30 seconds
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
11 minutes 0 seconds
Step-by-Step Explanation:
4 × 2 min = 8 min. 4 × 45 s = 180 s = 3 min. 8 min + 3 min = 11 minutes 0 seconds.
47
Short Answer
Hard
2 Marks
An airplane takes off at 11:45 AM on a flight lasting 3 hours and 35 minutes. At what time does it land?
A
3:20 PM
B
3:10 PM
C
2:50 PM
D
3:30 PM
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
3:20 PM
Step-by-Step Explanation:
11:45 AM + 15 min = 12:00 PM. Remaining time: 3 hours 20 minutes. 12:00 PM + 3 h 20 min = 3:20 PM.
48
Short Answer
Hard
2 Marks
If the time is exactly 9:00 AM, what is the angle formed between the hour hand and the minute hand?
A
A right angle (90°)
B
An acute angle (45°)
C
An obtuse angle (120°)
D
A straight angle (180°)
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
A right angle (90°)
Step-by-Step Explanation:
At 9:00, the minute hand points to 12 and the hour hand to 9, creating an exact 90° right angle.
49
Short Answer
Hard
2 Marks
Why does an analog clock's minute hand move 12 times faster than its hour hand?
A
The minute hand makes a full circle (60 min) in 1 hour, while the hour hand takes 12 hours to complete a circle
B
The minute hand is physically longer
C
The clock gears only turn during the day
D
Because there are 24 hours in a day
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
The minute hand makes a full circle (60 min) in 1 hour, while the hour hand takes 12 hours to complete a circle
Step-by-Step Explanation:
In 1 hour, the minute hand travels 360° while the hour hand travels 30° (360 ÷ 30 = 12 times faster).
50
Short Answer
Medium
1 Mark
Zoe calculates the duration between 1:50 PM and 2:10 PM as 60 minutes because 50 + 10 = 60. What is the actual elapsed time?
A
20 minutes
B
30 minutes
C
15 minutes
D
40 minutes
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
20 minutes
Step-by-Step Explanation:
From 1:50 to 2:00 is 10 minutes. From 2:00 to 2:10 is 10 minutes. 10 + 10 = 20 minutes.