Question

A boat makes a 120-mile trip downstream in 3 hours but makes the return trip in 4 hours. What is the rate of the boat in still water?

A.30 mph
B.32 mph
C.35 mph

Answer 1

The Answer would be B.32

Answer 2

The correct answer is C. The rate of the boat in still water is of 35 miles per hour.

Explanation:

As the boat makes a 120 mile trip downstream in 3 hours, and the return trip in 4 hours, we can say that it makes an entire 240 mile trip in 7 hours. As 240 / 7 = 35, that is the average speed the boat traveled in still water: the boat's rate in still water was of 35 miles per hour.