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 99 km/hr. What is the length of the platform?
Select the correct option:
A) 440
B) 488
C) 477
D) 426
E) 422
Speed = 99 * 5/18= 
<gadget id="calculator">99 * 5/18</gadget>
<output>55/2 = around 27.5</output>
27.5 m/sec.   Length of the train= 27.5 * 20= 
<gadget id="calculator">27.5 * 20</gadget>
<output>550</output>
550 m.   Let the length of the platform be x m . Then,   (x + 550)/36= 27.5 =&gt; x = 440 m.   440nswer: 440
<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 99 km/hr. What is the length of the platform?