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Question

Mukesh walks around a circular track of radius 14 m with a speed of 4 km/hr. If he takes 20 rounds of the track, he walks for ___ minutes.

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Solution

Radius of circular track = r = 14 m
Perimeter of circular track,
C=2×227×14=88 m
Mukesh takes 20 rounds of the track.
Total distance covered =20×88 m=1760 m
According to question,
Time taken by Mukesh to walk 4 km = 1 hr (60 min)

Time taken by Mukesh to walk 1 m =60 min400 m

Time taken by Mukesh to walk 1760 m =604000×1760=26.4 min

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