3 hours.
36
It is 9 hours.
2..25
4 hours 45 minutes.
8 hours and 15 minutes.
6 hours and 30 minutes.
0 hours are in 20 min an hour is 60 min
(8.25 + 24k) hours, where k is any integer.
3.25 hours or 3 hrs 15 mins
8 hours, 20 minutes
610 min / 60 = 10.167 hours.