5:30 would be the most common way of saying it.
530 minutes is 8 hours, 50 minutes.
1460
7.75 hours
This is equivalent to 16 hours.
530 / 80 = 6.625 hours
1360
Ten Hours
9
This is equivalent to 16 hours.
Ten hours.
10 and a half hours
5 hours 30 minutes.