A train 220 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 20 seconds. The speed of the train is: Choose the correct answer:
A) 41  B) 40.6  C) 40.8  D) 42  E) 42.6
Speed of the train relative to man =220/20= 
<gadget id="calculator">220/20</gadget>
<output>11</output>
11 m/sec.=11x18/5km/hr   = 198/5km/hr.   Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr.   x - 5 = 198/540.6 km/hr.   Answer:40.6
<result>B</result>
A train 220 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 20 seconds. The speed of the train is: