2 hours, 22 minutes.
255
6 and 1/2 hours
It would be 7 hours
The answer is 6 hours.
1 hr 2 minutes
2 hours 25 minutes
If you set a timing clock to zero at 9-00pm on Wednesday, by midnight it will have recorded 3-00 hours; we have reached the time which changes from the end of Wednesday to the beginning of Thursday; from there to 1-00am is only 1 hour, so altogether the elapsed time will be exactly 4-00 hours.
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.
10 hours
About 30 minutes
1 hour and 40 minutes.
6 and 1/2 hours
Two hours elapsed time.