3 hours.
6 hours and 40 minutes.
4 hours, 20 minutes 4 and 1/3 hours
12 hours
12 hours
12 Hours ! There are 12 hours in the AM and 12 hours in the PM !
From midnight (am) to Noon (pm) is 12 hours.
2.5 hours
2 hours.
7 and a half hours
6 hours.
21 hours
2 hours