Question

A car travels up a hill at a constant speed of 30 km/h and down the same hill at a constant speed of 50 km/h. Calculate the average speed of the car for the round trip (up and down the hill, the same distance)

Answer 1

Answer:

40 km/hr.

Explanation:

This is because (30 + 50) ÷ 2 = 40..

Answer 2

Answer:

37.5 km/h

Explanation:

average speed =[ 2*X*Y ] / (X+Y)