10 and a half hours
530 PM is equivalent to 5:30 PM. To calculate the number of hours between 5:30 PM and 10:00 PM, you subtract 5:30 PM from 10:00 PM. This results in 4 hours and 30 minutes. Therefore, there are 4.5 hours between 5:30 PM and 10:00 PM.
3 hours and 15 min
There are 11 hours between 6 am and 5:30 pm.
7.75 hours
This is equivalent to 16 hours.
The parameters you cite contain eight hours and 30 minutes.
Ten hours.
This is equivalent to 16 hours.
6 hours.
9 hours, 45 minutes
8 hours and 30 minutes.
(8.5+24k) hours where k is an integer.