A train went 300 miles from Dhakato Chittagongatan average rate of 80 miles per hour (mph). At what speed did it travel on the way back if its average speed for the whole trip was 100mph?

A train went 300 miles from Dhakato Chittagongatan average rate of 80 miles per hour (mph). At what speed did it travel on the way back if its average speed for the whole trip was 100mph?

A 1171/2 mph

B 125 mph

C 1331/3mph

D 1371/2mph

Solution

Correct Answer: Option C