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?	Pick one:	A) 9 ½ sec	B) 5 ½ sec	C) 6 ½ sec	D) 8 ½ sec	E) 2 ½ sec
8 ½ sec = 170   S = 72 * 5/18= 
<gadget id="calculator">72 * 5/18</gadget>
<output>20</output>
20 mps   T= 170/20 = 8 ½ sec   Answer:8 ½ sec
<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?