A train 110 m long is running with a speed of 30 km/h. In how many seconds will the train pass a man who is running at 3 km/h in the direction opposite to that in which the train is going?
Choose the correct choice.
A) 6  B) 8  C) 10  D) 12  E) 14
The speed of the train relative to the man = 30 + 3= 
<gadget id="calculator">30 + 3</gadget>
<output>33</output>
33 km/h.   33000 m/h * 1h/3600 s= (330/36) m/s   (110 m) / (330/36 m/s) = (110 * 36) / 330 = 36/3= 
<gadget id="calculator">36/3</gadget>
<output>12</output>
12 seconds   The answer is 12.
<result>D</result>
A train 110 m long is running with a speed of 30 km/h. In how many seconds will the train pass a man who is running at 3 km/h in the direction opposite to that in which the train is going?