A train 125 m long passes a man, running at 11 km/hr in the same direction in which the train is going, in 10 sec. The speed of the train is?  Choices:
A) 37 km/hr	B) 50 km/hr	C) 56 km/hr	D) 26 km/hr	E) 87 km/hr
Speed of the train relative to man = 125/10 = 25/2 m/sec.   = 25/2 * 18/5= 
<gadget id="calculator">25/2 * 18/5</gadget>
<output>45</output>
45 km/hr   Let the speed of the train be x km/hr. Then, relative speed= (x - 5) km/hr.   x - 11 = 45 =&gt; x = 56 km/hr.   Answer:56 km/hr
<result>C</result>
A train 125 m long passes a man, running at 11 km/hr in the same direction in which the train is going, in 10 sec. The speed of the train is?