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?	Choose the correct choice from the following choices:  A) 150 m  B) 350 m  C) 300 m  D) 240 m  E) none
Speed =(54 x5/18m/sec) = 15 m/sec.   Length of the train = (15 x 20)m =300 m.   Let the length of the platform be x metres.   Then,x + 300/36= 15   x + 300 = 540   x = 240 m   Answer: 240 m
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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?