Question

A bus moves from stop “A” to stop “B” with a speed of 40 Km/h and then from stop “B” to

stop “A” with a speed of 50 Km/h. Find its average speed for the whole journey. Express this

speed in S.I. system also.
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Answer 1

average speed =(2v1.v2)/(v1+v2) where v is speed

= (2×40×50)/(40+50)

= 4000/90

= 4.44444444 upto infinity

hope it helps you