Question

car travelling hundred kilometre at the speed of 60 km per hour and returns with a speed of 40 km per hour calculate the average speed

Answer 1

Answers

Time taken to go = 100/60=5/3hr
time taken to return = 100/40=5/2hr
total distance = (100+100)km = 200km
total time taken = (5/3 + 5/2)hr = 25/6 hr
average speed = total distance / total time
=200/25/6
=200*6/25
=48kmph
hence average speed is 48 kmph
hope it helps