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
A) 289 m B) 676 m C) 240 m D) 239 m E) 186 m
Speed = (54 * 5/18) m/sec = 15 m/sec. Length of the train = (15 x 20)m   = 300 m. Let the length of the platform be x meters. Then, (x + 300)/36 = 15 ==&gt; x + 300 = 540   ==&gt; x   = 240 m.   Answer:240 m
<result>C</result>
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?