A train passes a station platform in 36 sec and a man standing on the platform in 20 sec. If the speed of the train is 90 km/hr. What is the length of the platform?
Choose the correct option
A) 400 B) 488 C) 477 D) 426 E) 422
Speed = 90* 5/18= 
<gadget id="calculator">90* 5/18</gadget>
<output>25</output>
25 m/sec.   Length of the train= 25 * 20= 
<gadget id="calculator">25 * 20</gadget>
<output>500</output>
500 m.   Let the length of the platform be x m . Then,   (x + 500)/36= 25 =&gt; x =400 m.   400nswer: 400
<result>A</result>
A train passes a station platform in 36 sec and a man standing on the platform in 20 sec. If the speed of the train is 90 km/hr. What is the length of the platform?