A train 220 m long is running with a speed of 60 km/hr. In what time will it pass a man who is running at 4 km/hr in the direction opposite to that in which the train is going?  Choices:
A) 5 B) 12 C) 7 D) 9 E) 5
Speed of train relative to man = 60 + 4= 
<gadget id="calculator">60 + 4</gadget>
<output>64</output>
64 km/hr.= 64 * 5/18 = 160/9 m/sec.   Time taken to pass the men = 220 * 9/160 = 12 sec.Answer: 12
<result>B</result>
A train 220 m long is running with a speed of 60 km/hr. In what time will it pass a man who is running at 4 km/hr in the direction opposite to that in which the train is going?