A train having a length of 240 m passes a post in 24 seconds. How long will it take to pass a platform having a length of 630 m?	Choices:  A) 120 sec  B) 99 sec  C) 89 sec  D) 87 sec  E) 85 sec
Explanation:   v = 240/24 (where v is the speed of the train) = 10 m/s   t = (240+630)/10= 
<gadget id="calculator">(240+630)/10</gadget>
<output>87</output>
87 seconds   Answer: Option 87 sec
<result>D</result>
A train having a length of 240 m passes a post in 24 seconds. How long will it take to pass a platform having a length of 630 m?