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