There are total 15 hours or 900 minutes from 7am to 10pm. In words, this duration is equal to fifteen hours or nine hundred minutes.
How many hours from
| 1AM to 6AM | 7AM to 10AM | 10AM to 3PM |
| 12PM to 5PM | 5AM to 8PM | 8PM to 9AM |
| 5AM to 2PM | 7PM to 12AM | 8AM to 6PM |
| 5PM to 9PM | 9AM to 8AM | 9AM to 10AM |
| 11PM to 12PM | 11PM to 3PM | 6PM to 2PM |
| 8PM to 10AM | 2PM to 9PM | 12AM to 7AM |
