The image you've uploaded contains two
time word problems with their solutions, and it's designed to teach how to solve time-related problems using both
12-hour and
24-hour clock formats. Let's go through each example carefully and explain the solution step by step.
---
🔹 Example 1:
>
Problem:
> Sara started doing her work at 14:00 hrs and finished it at 16:40 hrs. How much time did she take to finish her work?
####
✔ Step-by-step Solution:
- The times are in
24-hour clock format.
- We need to find the
elapsed time between 14:00 and 16:40.
Let’s subtract:
```
16:40
- 14:00
-------
2:40
```
So, Sara took
2 hours and 40 minutes to finish her work.
✔ Answer: 2 hours and 40 minutes.
> ✔️ This is correct because:
> - From 14:00 to 15:00 = 1 hour
> - From 15:00 to 16:00 = 1 hour (total 2 hours)
> - From 16:00 to 16:40 = 40 minutes
Total =
2 hours 40 minutes
---
🔹 Example 2:
>
Problem:
> Ali left home for work at 10:15 a.m. and reached there after exactly 2 hours. What was the time when he reached his workplace?
####
✔ Step-by-step Solution:
- The times are in
12-hour clock format.
- We need to
add 2 hours to 10:15 a.m.
Add:
```
10:15 a.m. + 2 hours = 12:15 p.m.
```
Why?
- 10:15 a.m. → 11:15 a.m. (after 1 hour)
- 11:15 a.m. → 12:15 p.m. (after another hour)
Note: After 12:00 p.m., we switch from "a.m." to "p.m."
✔ Answer: 12:15 p.m.
---
📌 Summary of Key Concepts:
| Concept | Explanation |
|--------|-------------|
|
24-Hour Clock | Used in military, trains, flights, etc. (e.g., 14:00 = 2:00 p.m.) |
|
12-Hour Clock | Uses a.m. (before noon) and p.m. (after noon) |
|
Elapsed Time | Time that passes between two events |
|
Adding/Subtracting Time | Handle hours and minutes separately; carry over if needed |
---
✔ Final Answers Recap:
1.
Sara took
2 hours and 40 minutes to finish her work.
2.
Ali reached his workplace at
12:15 p.m.
---
If you have any more questions or want to practice similar problems, feel free to ask! 😊
Parent Tip: Review the logic above to help your child master the concept of time problem worksheet for grade.
