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Question
A government office opens at 7 in the morning and closes at 3 in the afternoon. How long is this office open?
Solution
3 in the afternoon = 15 hrs in 24 hrs clock
| Hrs. | Min. | |
| 1 5 | 0 0 | Closing time |
| - 7 | 0 0 | Opening time |
| 8 | 0 0 |
∴ The office remains open for 8 hours.
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