nine
4 to 12 = 8
12 to 1 = 1
8 + 1 = 9
It is (9 + 24k) hours, where k is an integer.
It is nine hours.
10
6
12am to 4pm is 16 hours.
6 hours from 4pm to 10pm
7am to 4pm is 9 hours.
4pm to midnight is 8 hours.
10am to 4pm is a period of six hours.
19 hours
9 hours
17
6
From 8am to 1pm is 5 hours. From 8am to 1am is 17 hours. From 8pm to 1am is 5 hours. From 8pm to 1pm is 17 hours.
56 hours
7 hours