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 640 m?  Pick:
A) 120 sec B) 99 sec C) 89 sec D) 80 sec E) 88 sec
88 secxplanation:   v = 240/24 (where v is the speed of the train) = 10 m/s   t = (240+640)/10= 
<gadget id="calculator">(240+640)/10</gadget>
<output>88</output>
88 seconds   Answer: Option 88 sec
<result>E</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 640 m?