A train travelling at 30 km an hour took 13 1/ 2 sec in passing a certain point. Find the length of the train?

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Accepted Answer

Speed = 30 km/hr = 30 x (5/18) = 25/3 m/sec. ∴ Length of the train = (25/3) x (27/2) = 225/2 = 1121/2 metres

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