A train 110 m long is running with a speed of 36 km/hr. In what time will it pass a man who is running at 6 km/hr in the direction opposite to that in which the train is going? Options:
A) 5
B) 6
C) 7
D) 9
E) 5
Speed of train relative to man = 36 + 6= 
<gadget id="calculator">36 + 6</gadget>
<output>42</output>
42 km/hr.= 42 * 5/18 = 35/3 m/sec.   Time taken to pass the men = 110 * 3/35 = 9 sec.Answer: 9
<result>D</result>
A train 110 m long is running with a speed of 36 km/hr. In what time will it pass a man who is running at 6 km/hr in the direction opposite to that in which the train is going?