Answer:
5 hours and 15 minutes
Explanation:
From 11:55 A.M. to 12:00 P.M. is 5 minutes.
From 12:00 P.M. to 12:10 P.M. is 10 minutes.
From 12:10 P.M. to 5:10 P.M. is 5 hours.
If you add all of that up to get the time that has elapsed, you will get 5 hours and 15 minutes.