Question

A train travells a distance with a speed of 30km/h and returns with a speed of 50km/h . Calculate the avrage speed of train​

Answer 1

2*30*50/30+50

2*30*50/80

37.5

Answer 2

Explanation:

average speed=(2v1v2)/v1+v2

=(2×30×50)/30+50

=(2×30×50)/80

=75/2

=37.5