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