A train passes a station platform in 38 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 option
A) 248 m B) 240 m C) 270 m D) 765 m E) 176 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)/38 = 15 ==&gt; x + 300 = 570 ==&gt; x   = 270 m.   Answer: 270 m
<result>C</result>
A train passes a station platform in 38 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?