7 hours
8 hours.
1.5 hours.
7 hours and 30 minutes.
2hrs and 30mins
3am to 2pm is 11 hours.
There are 7 hours between 7 am to 2pm
3am to 2pm is 11 hours.
7am to 2pm is 7 hour.
9 + 24k where k is an integer.
4 hours and 15 minutes.
There are 17 hours between 9pm and 2pm the following day.