A truck driver must complete a 180 mile trip in 4 hours. If he drives on average 50 miles an hour for the first 3 hours of the trip, at what speed must be drive in the final hour?

A truck driver must complete a 180 mile trip in 4 hours. If he drives on average 50 miles an hour for the first 3 hours of the trip, at what speed must be drive in the final hour?

A 30 mph

B 35 mph

C 40 mph

D 50 mph

Solution

Correct Answer: Option A