Question

A train travels between two stations A and B while going from A to B its average speed is 100 kilometre per hour when coming back from B to a its average speed in 150 km per hour find the average speed during the whole journey

Answer 1

average velocity = vi+vf/2

Vav = 100+150/2

Vav = 250/2

Vav = 125km per hour

Answer 2

the average speed between A to B = 100km pr hour average speed B to A is = 150km per hour
average speed during the whole journey = (100+ 150)/ 2 =250/2=125km pr hour