Answer / debabrata pal

Since,the two trains are travelling in the same
direction,the relative speed is : 72-54=18Kmph or 5m/sec
Distance travelled to overtake is equal to the sum of
length's of the two trains : 100 + 200 = 300m
Time taken by the faster train to overtake the slower train is :
Time taken = (distance travelled/relative speed)
=300/5
=60sec
=1min

Answer / harry

It takes 1min to overtake another train 200m long traveling
at 54kmph.

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