There are total 11 hours or 660 minutes from 9am to 8pm. In words, this duration is equal to eleven hours or six hundred sixty minutes.
How many hours from
| 10AM to 5AM | 7PM to 11PM | 3AM to 6AM |
| 11PM to 9AM | 7AM to 3PM | 10PM to 6PM |
| 3AM to 10PM | 7AM to 12AM | 2PM to 1AM |
| 2PM to 7AM | 6AM to 7AM | 11AM to 11PM |
| 10PM to 1AM | 2PM to 1AM | 9AM to 10PM |
| 9AM to 6AM | 8PM to 12AM | 3PM to 10AM |
