Please solve this point
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speed=distance/time
velocity=displacement/time
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speed is the distance covered per unit time
while velocity is total displacement per unit time
average speed = total distance covered / total time taken
= 180m / 60s
= 3 m/s
average velocity = total displacement / total time taken
here she goes to the other side of the pool and comes back to the same place, so she went from initial point to the initial point which means displacement is zero.
= 0m / 60s
= 0 m/s
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