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? Choose the correct option:	A) 8 1/2 sec	B) 8 1/9 sec	C) 8 5/2 sec	D) 4 1/2 sec	E) 5 1/2 sec
D = 170   S = 72 * 5/18= 
<gadget id="calculator">72 * 5/18</gadget>
<output>20</output>
20 mps   T= 170/20 = 8 1/2 sec   8 1/2 secnswer:8 1/2 sec
<result>A</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?