A train 100 meter long takes 3 second to cross a man walking at the rate of 6km/hr in a direction opposite to that of the train. Find the speed of the train.
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Step-by-step explanation:
speed of man = 6kmph = 6×5/18=5/2mps
total distance covered by the man in 3 second = 5/2×3=15/2m
total distance covered by the train = 100+15/2
= 215/2
speed of the train= 215/2/3
= 215/6 m/s
=129 km/hr
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