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Q.

A runner makes one lap around a 200 m circular track in 25 s. The average

speed of the runner is               

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a

4 ms−1

b

16 ms−1

c

8 ms−1

d

0 ms−1

answer is C.

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Detailed Solution

s=200 m,t=25s

Average speed = v  =  st

v=20025=8ms−1

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