4:30
8:30 to 9:00 is 0:30
9:00 to 12:00 is 3:00
12:00 to 1:00 is 1:00
Then 0:30 + 3:00 + 1:00 = 4:30
Four hours thirty minutes.
Unless it is 12 hours later
e.g. 8:30am to 1:00am the next day, so = 16:30 hours
8 and 1/2
6 hours.
7.5 hours
7 hours
8 hours 15mins.
7.5 hours
8
4.5
315
8:30 to 5 is 8 and 1/2 hours no matter what you do for lunch.
(5.5+24k) hours where k is an integer.
Eight hours.