Question

A body travels along a straight line path from A to B with a speed of 40km/h and returns back along the same path with a speed of 60km/h. Calculate the average speed and velocity.​

Answer 1

40+60/2

100/2

50kmph is average speed.

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Answer 2

Average velocity is

$(d + d) \div ((d \div 40) + (d \div 60)) \\ \\ = (2 \times 40 \times 60) \div (40 + 60) \\ = 48$