A man travels a distance of 420 km by train which moves at the speed of 75 km/h and returns back by car at the speed of 50 km/h. Find his average speed for the whole journey.

Show answer & explanation

Answer: (C) 60 km/h

Explanation

For equal distances, average speed = 2 × 75 × 50/(75 + 50) = 7500/125 = 60 km/h.