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Usha swims in a 90 m long pool. she covers 180 m in 1 minute by swimming from one end to other and back into the same path. find the average speed and

average velocity of the body?


Displacement is zero because Usha's final position and initial position are the same.
Average velocity=displacement/time=0
Average speed=total distance covered/total time taken
180/60=3 m/s
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