12 hours 30 minutes
23 hours 15 minutes minus 45 minutes is 22 hours 30 minutes.
10 hours 18 minutes
6 hours 15 minutes.
7 hours 12 minutes - 3 hours 30 minutes = 3 hours 42 minutes
(20 hours 30 minutes) - (5 hours 45 minutes) = 14 hours 45 minutes.
Assuming that you do not mean mince but minus, the answer is 1 hour 51 minutes and 47 seconds.
1 hour 45 minutes.
3 hours 40 minutes.
The result is 12 days 18 hours 50 minutes 58.56 seconds.
13 hours and 15 minutes.
13 hours, 30 minutes, 0 seconds.
1 hour 45 minutes.