It is 3 hour and 36 minutes.
216 hours = 9 days
216 hours is 9 days @24 hours per day.
216 hours / 24 hours per day = 9 days
1 hour = 60 minute so 216 hours = 216*60 = 1296 minutes. Simple!
0 hours are in 20 min an hour is 60 min
8 hours, 20 minutes
610 min / 60 = 10.167 hours.
216
2 hours
5 hours, 50 minutes
28.8
3 hours and 36 minutes.