Here is how I determined this mentally... There are 12 hours from 8:00am to 8:00pm ... so there is 1/2-hour less for the hours of 8:30am to 8:00pm ... which means 11 and 1/2 (11.5) hours.
There are 8.5 hours. * hours and 30 minutes
Eight hours and thirty minutes.
1229880
8:00am is eight hours, 8:00pm is twenty hours (20:00). 12:00am is zero hours (00:00), 12:00pm is twelve hours. 12:30am is thirty minutes (00:30), 12:30pm is twelve hours and thirty minutes. 4:30am is four hours and thirty minutes, 4:30pm is sixteen hours and thirty minutes (16:30).
Eight am to three thirty pm is how many hours
Four hours and thirty minutes.
Five hours and thirty minutes.
0:26 + 2:00 + 11:12 = 13:38 thirteen hours thirty-eight minutes
There are 19,800 seconds in five hours and thirty minutes. You need to do the math. All you need to do is multiply.
Thirty seconds is one half minute. Four minutes is the product of eight half minutes (8/2=4).
733
Five hours thirty minutes