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  1. A train travelling at 30 km an hour took 131/2 sec in passing a certain point. Find the length of the train ?
    1. 113 metres
    2. 112 metres
    3. 112.5 metres
    4. None of these
Correct Option: C

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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