A train passes a man standing on the platform. If the train is 210 meters long and its speed is 72 kmph, how much time it took in doing so?	Pick:  A) 10 ½ sec  B) 4 ½ sec  C) 9 ½ sec  D) 8 ½ sec  E) 2 ½ sec
D = 210   S = 72 * 5/18= 
<gadget id="calculator">72 * 5/18</gadget>
<output>20</output>
20 mps   T= 210/20 = 10 ½ sec   10 ½ secnswer: 10 ½ sec
<result>A</result>
A train passes a man standing on the platform. If the train is 210 meters long and its speed is 72 kmph, how much time it took in doing so?