The average speed is 8 miles per hour
Solution:
Given that,
Malcolm coasted 32 miles from moon ridge to me Toné and the pedaled back hard
The round trip took 4 hours
To find: Average speed in miles per hour
The average speed is given by formula:

From given,
Total distance traveled = 32 miles
Total time taken = 4 hours
Substituting the values in formula, we get

Thus average speed is 8 miles per hour