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