Question

Usha swims in a 90m long pool . She covers 180m in one minute by swimming from one end to the other and back along the same straight path . Find the average speed and average velocity of Usha

Answer 1

average speed- 3m/s
average velocity- 0m/s,as the displacement is 0

Answer 2

Hi Dear
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Average velocity is zero because  displacement is zero 
Average speed = total distance / total time= 180/60= 3 m/s