A car travels from A to B at a speed of 40 km/hr, travels back from B to A at a speed of 30 km/hr and again goes from A to B at a speed of 60 km/hr. What is the average speed of the car?

Question

Accepted Answer

40 km/hr. Average speed = 3d/(d/40+d/30+d/60) = 3/((3+4+2)/120) = 3·120/9 = 40 km/hr.

A car travels from A to B at a speed of 40 km/hr, travels back from B to A at a speed of 30 km/hr and again goes from A to B at a speed of 60 km/hr. What is the average speed of the car?

Explanation

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