Question

Mike solves 56 problems in 1 hour 45 min, how many problems does he solve per hour

Answer 1

Answer is 32 problems per hour
Explained
56 problems divided by 1.75 = 32
The reason I used 1.75 is because 1 hr 45 minutes is 1 hour and the 45 minutes is 3/4 of an hour on the clock, 3/4 is the same as .75

Answer 2

32 problems per hour