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What is the speed of the train? I.  The train crosses a tree in 13 seconds. II.  The train crosses a platform of length 250 metres in 27 seconds.  III.  The train crosses another train running in the same direction in 32 seconds. ?->(Show Answer!)
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• By: guest on 01 Jun 2017 05.48 pm
Let the speed of the train be x metres/sec. Time taken to cross a tree = Length of the train Speed of the train Time taken to cross a platform = (Length of the train + Length of the Platform) Speed of the train I gives, 13 = l     13x. x II gives 27 = l + 250 x 13x + 250 = 27 x x = 125 m/sec. 7 Thus I and II give the speed of the train. The correct answer is (A.)
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