Question

Ramesh goes from station A to station B at the speed of 40 km/hr and returns at the speed of 60km/hr. Find his average speed during whole journey (Answer is given 48km/hr)

Answer 1

let distance between two stations be x. so time taken for first trip is x/40
similarly time taken for next trip is x/60
so average speed is 2x/(x/24)=48
(average speed =total distance/total time)