Solve the Problem. -The Amount of Time It Takes a Swimmer to Swim

Multiple Choice

Solve the problem.
-The amount of time it takes a swimmer to swim a race varies inversely as the average speed of the swimmer. A swimmer finishes a race in 60 seconds with an average speed of 5 feet per second. Find the average speed of the swimmer if it takes 100 seconds to finish the race.

A) 4 ft/sec
B) 2 ft/sec
C) 5 ft/sec
D) 3 ft/sec