There are total 15 hours or 900 minutes from 6am to 9pm. In words, this duration is equal to fifteen hours or nine hundred minutes.
How many hours from
| 11AM to 7AM | 8PM to 3AM | 9PM to 4PM |
| 9AM to 11PM | 8AM to 9AM | 3AM to 6PM |
| 6AM to 4AM | 3PM to 7PM | 3PM to 4AM |
| 11AM to 8AM | 5PM to 5AM | 5PM to 1PM |
| 7AM to 3AM | 5PM to 11AM | 3PM to 7PM |
| 5PM to 11AM | 5AM to 11PM | 9AM to 5PM |
