Worksheet for calculating end times based on start times and elapsed durations.

To find the End Time, we add the Elapsed Time to the Start Time.

Here is how to do it step by step for each row:
1. Add the minutes first. If the minutes go over 60, take away 60 and add 1 hour to the hours.
2. Add the hours next (including any extra hour from the minutes).

Let's solve them one by one:

1. Start: 09.20 | Elapsed: 1 h 10 min
* Minutes: $20 + 10 = 30$
* Hours: $9 + 1 = 10$
* End: 10.30

2. Start: 06.00 | Elapsed: 3 h 10 min
* Minutes: $00 + 10 = 10$
* Hours: $6 + 3 = 9$
* End: 09.10

3. Start: 03.10 | Elapsed: 7 h 30 min
* Minutes: $10 + 30 = 40$
* Hours: $3 + 7 = 10$
* End: 10.40

4. Start: 09.25 | Elapsed: 2 h 50 min
* Minutes: $25 + 50 = 75$. Since 75 is more than 60, we have 15 minutes left ($75 - 60$) and carry over 1 hour.
* Hours: $9 + 2 + 1 \text{ (carry)} = 12$
* End: 12.15

5. Start: 04.20 | Elapsed: 3 h 10 min
* Minutes: $20 + 10 = 30$
* Hours: $4 + 3 = 7$
* End: 07.30

6. Start: 05.15 | Elapsed: 3 h 5 min
* Minutes: $15 + 5 = 20$
* Hours: $5 + 3 = 8$
* End: 08.20

7. Start: 07.30 | Elapsed: 4 h 10 min
* Minutes: $30 + 10 = 40$
* Hours: $7 + 4 = 11$
* End: 11.40

8. Start: 02.10 | Elapsed: 3 h 5 min
* Minutes: $10 + 5 = 15$
* Hours: $2 + 3 = 5$
* End: 05.15

9. Start: 02.40 | Elapsed: 8 h 30 min
* Minutes: $40 + 30 = 70$. Since 70 is more than 60, we have 10 minutes left ($70 - 60$) and carry over 1 hour.
* Hours: $2 + 8 + 1 \text{ (carry)} = 11$
* End: 11.10

10. Start: 06.40 | Elapsed: 2 h 10 min
* Minutes: $40 + 10 = 50$
* Hours: $6 + 2 = 8$
* End: 08.50

11. Start: 03.40 | Elapsed: 3 h 30 min
* Minutes: $40 + 30 = 70$. Since 70 is more than 60, we have 10 minutes left ($70 - 60$) and carry over 1 hour.
* Hours: $3 + 3 + 1 \text{ (carry)} = 7$
* End: 07.10

12. Start: 08.10 | Elapsed: 3 h 20 min
* Minutes: $10 + 20 = 30$
* Hours: $8 + 3 = 11$
* End: 11.30

13. Start: 05.40 | Elapsed: 4 h 30 min
* Minutes: $40 + 30 = 70$. Since 70 is more than 60, we have 10 minutes left ($70 - 60$) and carry over 1 hour.
* Hours: $5 + 4 + 1 \text{ (carry)} = 10$
* End: 10.10

Final Answer:
| Start | End | Elapsed Time |
| :--- | :--- | :--- |
| 09.20 | 10.30 | 1 h 10 min |
| 06.00 | 09.10 | 3 h 10 min |
| 03.10 | 10.40 | 7 h 30 min |
| 09.25 | 12.15 | 2 h 50 min |
| 04.20 | 07.30 | 3 h 10 min |
| 05.15 | 08.20 | 3 h 5 min |
| 07.30 | 11.40 | 4 h 10 min |
| 02.10 | 05.15 | 3 h 5 min |
| 02.40 | 11.10 | 8 h 30 min |
| 06.40 | 08.50 | 2 h 10 min |
| 03.40 | 07.10 | 3 h 30 min |
| 08.10 | 11.30 | 3 h 20 min |
| 05.40 | 10.10 | 4 h 30 min |