Answer: 16 mi/h
Explanation:
1. To solve this problem you must use the formula shown below:
V=d/t
Where V is the average speed, d is the distance and t is the time.
2. You must substitute the value given in the probelm above into the formula:
(You have that 3 3/4 h=3+0.75 h=3.75 h)
V=60mi/3.75h
V=16 mi/h