A train 200 m long , travelling at 72 kmph overtakes another train travelling at 54 kmph and passes it completely in 90 seconds. Find the length of the second train.
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Step-by-step explanation:
50 sec
relative velocity of faster train with respect to slower train is 10m/s.
for overtaking the train relative distance to be covered is 200+300=500.
so time taken is 50sec
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