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
| 9PM to 3PM | 12PM to 7AM | 11PM to 12PM |
| 9AM to 5PM | 4PM to 1AM | 1PM to 1AM |
| 1AM to 3PM | 7AM to 5PM | 11AM to 12AM |
| 6AM to 9PM | 11PM to 9AM | 9PM to 2PM |
| 4AM to 7PM | 1PM to 12AM | 10PM to 6AM |
| 8AM to 5PM | 2AM to 12AM | 1PM to 6AM |
