A train passes a man standing on the platform. If the train is 180 meters long and its speed is 72 kmph, how much time it took in doing so? Answers.
A) 6 Â½ sec B) 6 Â½ sec C) 9 Â½ sec D) 9 sec E) 7 Â½ sec
9 sec   9 sec   9 sec = 180   S = 72 * 5/18= 
<gadget id="calculator">72 * 5/18</gadget>
<output>20</output>
20 mps   T= 180/20= 
<gadget id="calculator">180/20</gadget>
<output>9</output>
9 sec
<result>D</result>
A train passes a man standing on the platform. If the train is 180 meters long and its speed is 72 kmph, how much time it took in doing so?