Question

A car travels 100 km hr at a spee o 60 km/hr and returns with a speed of 40km/hr. calculate the avg. spped of journey

Answer 1

avg speed=total distance traveled / total time taken
avg speed according to the question is
60 km +40km/100=1 km/hr
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Answer 2

total time traveled=100/60+100/40=5/3+5/2=10/6+15/6=25/6
distance traveled=200
average speed=200/(25/6)=48
average speed for the whole journey=48 km/hr