A train passes a station platform in 50 sec and a man standing on the platform in 15 sec. If the speed of the train is 54 km/hr. What is the length of the platform?	Select: A) 227 B) 500 C) 550 D) 525 E) 171
Speed = 54 * 5/18= 
<gadget id="calculator">54 * 5/18</gadget>
<output>15</output>
15 m/sec.   Length of the train= 15 * 15= 
<gadget id="calculator">15 * 15</gadget>
<output>225</output>
225 m.   Let the length of the platform be x m . Then,   (x + 225)/50= 15 =&gt; x = 525m.   Answer:525
<result>D</result>
A train passes a station platform in 50 sec and a man standing on the platform in 15 sec. If the speed of the train is 54 km/hr. What is the length of the platform?