A swimming pool is 90 m long. Rekha covers 180 m in one minute by swimming from one end to the other and back along the same straigh path. Find the average speed and average velocity of Rekha.

0 m/s, 3m/s

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3m/s, 4m/s

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3m/s, 0m/s

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2m/s, 4m/s

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Solution

The correct option is C
3m/s, 0m/s

Here, total distance covered = 180 m

Total displacement = 0

and total time = 1 min = 60 s

Average speed = $\frac{T o t a l D i s t a n c e}{T o t a l T i m e}$ = $\frac{180}{60}$ m/s = 3 m/s

Average velocity = $\frac{T o t a l D i s p l a c e m e n t}{T o t a l T i m e}$ = $\frac{0}{60}$ = 0 m/s

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A swimming pool is 90 m long. Rekha covers 180 m in one minute by swimming from one end to the other and back along the same straigh path. Find the average speed and average velocity of Rekha.

The correct option is C 3m/s, 0m/s Here, total distance covered = 180 m Total displacement = 0 and total time = 1 min = 60 s Average speed = Total DistanceTotal Time = 18060 m/s = 3 m/s Average velocity = Total DisplacementTotal Time = 060 = 0 m/s