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Question

A train 165 m long is running at the speed of 60 km/hr. Find the time taken to pass a man who is running at a speed of 6 km/hr in the same direction as that of the train?


A

10 s

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B

15 s

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C

18 s

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D

11 s

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Solution

The correct option is D

11 s


Given,
Speed of man (S2) = 6 km/hr
Speed of the train (S1) = 60 km/hr

The man and the train are moving in the same direction,so the relative speed = (S1S2)=(606)=54 km/hr

Converting it to m/s,
54×518=15 m/s
Length of train = 165 m
Time taken by the train to pass the man is DistanceRelative speed=16515=11s


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