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