Question

A student while going to school in school bus observes the average speed of the bus to be 20km/h. On his return trip along the same way the average speed 30km/h. What is the average speed of the bus in the entire journey?

Answer 1

average speed while going v1 =20km/ he
average speed while returning v2= 30km/he

average speed = v1+v2/2
=20+30/2
=70/2
= 35km/he
so the average speed of journey is 35km/hr