4 hours and 30 minutes.
255
2 hours, 22 minutes.
6 and 1/2 hours
It would be 7 hours
1 hr 2 minutes
0:25 + 1:00 + 0: 25 = 1:50
I do it in two parts. I calculate how much time has elapsed between the AM and noon, then how much time has elapsed between noon and the PM, then add them together.
18 minutes
6 hours have been elapsed
255
The elapsed time of 1 pm to 9 am is 20 hours.
2 hours, 22 minutes.
10 hours
About 30 minutes
1 hour and 40 minutes.
6 and 1/2 hours
Two hours elapsed time.