There are total 20 hours or 1200 minutes from 1am to 9pm. In words, this duration is equal to twenty hours or one thousand two hundred minutes.
How many hours from
| 11AM to 8AM | 4PM to 9AM | 4AM to 11PM |
| 10AM to 11PM | 1AM to 3PM | 5AM to 3PM |
| 6PM to 1PM | 1PM to 4AM | 12AM to 2PM |
| 11PM to 2AM | 3AM to 4AM | 4PM to 8AM |
| 7AM to 8AM | 10PM to 9PM | 12PM to 7PM |
| 12AM to 1AM | 10PM to 9PM | 2AM to 7PM |
