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A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?

A. 120 meter

B. 240 meter

C. 300 meter

D. None of these

Correct Answer : B.


Speed =54×518 m/sec =15m/sec. Length of the train = (15 x 20)m = 300 m.  Let the length of the platform be x metres.  Then, x + 30036 = 15 ⇒ x + 300 = 540   ⇒x = 240 m.

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