9 hours, 45 minutes
15 hours
8 hours and 15 minutes.
15 hours is 900 minutes.
11 hours, 15 minutes
About 3 hours and 15 minutes
There are 4 hours and 15 minutes, or 4.25 hours, between 3:00 pm and 7:15 pm.
7 hours and 15 minutes !
15 hours and 51 minutes.
4 hours 15 minutes
The duration between 3:30 pm and 9:15 pm is 5 hours and 45 minutes.
135 minutes = 2 .25 hours or 2 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.