7 hours and 30 minutes
The duration between 3:30 pm and 9:15 pm is 5 hours and 45 minutes.
You can subtract the hours and the minutes separately.
That is a total of 5 hours and 30 minutes.
It will be 5:28 PM in 73 minutes.
There are 35 minutes
240 minutes
79 minutes.
80 minutes.
89 minutes.
42 minutes.
There are (30 + 1440k) minutes, where k is an integer.
There are 5 hours and 48 minutes between 1:48 pm and 6:36 pm.
23 hours and 38 minutes.
28 of them.
675 minutes.
813 minutes