1. Add: 2 hours 30 minutes + 4 hours 55 minutes

2. Add: 3 hours 50 minutes + 4 hours 20 minutes

3. Subtract: 4 hours 25 minutes - 1 hour 55 minutes

4. Subtract: 6 hours 15 minutes - 2 hours 45 minutes

5. A government office opens at 7 am and closes at 3 pm. How long is this office open?

6. A movie starts at 3:45 pm and finishes 2:30 hours later. At what time does it end?

7. Sakharam was ploughing the field from 8 am to 12:30 pm? How long was he ploughing?

8. If a bank is open from 10 am to 4:30 pm, how long is it open?

9. If a shop is open from 9:30 am to 10 pm, how long is it open?