a car travels a distance A to B at a speed of 40 km/h and returns to A at a speed of 30 km/h. The average velocity of whole journey
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Explanation:
the velocity with which it goes from A to B is 40km/h
the velocity with which it returns back to A is 30 km/h
average velocity=total displacement/total time taken
as in this case total displacement is 0
=average velocity is 0
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