Problem: A man drives miles to the seashore in hours and minutes. He returns from the shore to the starting point in hours and minutes. Let be the average rate for the entire trip. Then the average rate for the trip going exceeds , in miles per hour, by:
Answer Choices:
A.
B.
C.
D.
E.
Solution:
Let be the average rate for the trip going
Then (miles per hour)
(miles per hour)