Question

A train travels with a speed of 60 km /h from station a to statikn b and then comes back with a speed of 80 km/h fron station b to station

a. find the average speed

Answer 1

speed from station a to b = 60 km per hour speed from station b to a =80 km per hour
so average speed=
$(60 + 80) \div 2 \\ = 140 \div 2 \\ = 70$