There are total 11 hours or 660 minutes from 10am to 9pm. In words, this duration is equal to eleven hours or six hundred sixty minutes.
How many hours from
| 9AM to 6AM | 4AM to 7PM | 9PM to 3AM |
| 1AM to 8PM | 6AM to 4AM | 9PM to 12AM |
| 11PM to 8PM | 5PM to 9PM | 2AM to 9PM |
| 5AM to 3AM | 3AM to 8PM | 10AM to 7PM |
| 8PM to 10PM | 8AM to 4PM | 8AM to 3PM |
| 4AM to 5PM | 6PM to 11AM | 2PM to 12PM |
