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A train is 100 meter long and is running at the speed of 30 km per hour. Find the time it will take to pass a man standing at a crossing.

A. 10 seconds

B. 12 seconds

C. 14 seconds

D. 16 seconds

Correct Answer : B.


As we need to get answer in seconds, so never forget to convert speed into meter per second.
Speed = 30 km/hr = 30* 5/18 m/sec
= 25/3 m/sec
Distance = length of train = 100 meter
Required time =DistanceSpeed equals fraction numerator 100 over denominator begin display style 25 over 3 end style end fraction equals 100 cross times 3 over 25 space equals 12 space S e c

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