A train passes a man standing on the platform. If the train is 170 meters long and its speed is 72 kmph, how much time it took in doing so?	Options:
A) 7 1/2  B) 5 1/2  C) 2 1/2  D) 8 1/2  E) 8 2/2
8 1/2 = 170   S = 72 * 5/18= 
<gadget id="calculator">72 * 5/18</gadget>
<output>20</output>
20 mps   T= 170/20 = 8 1/2 sec   Answer: 8 1/2
<result>D</result>
A train passes a man standing on the platform. If the train is 170 meters long and its speed is 72 kmph, how much time it took in doing so?