9 hours, 45 minutes
15 hours
8 hours and 15 minutes.
15 hours is 900 minutes.
11 hours, 15 minutes
There are 4 hours and 15 minutes, or 4.25 hours, between 3:00 pm and 7:15 pm.
About 3 hours and 15 minutes
7 hours and 15 minutes !
15 hours and 51 minutes.
4 hours 15 minutes
Between ten past nine in the morning and fifteen minutes later - (that is twenty five past nine in the morning), there are zero hours and fifteen minutes.
5 hours and 15 minutes.
15 hours 33 minutes !