A train 100m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:	Choose the most appropriate option:
A) 46  B) 50  C) 40  D) 36  E) 41
Speed of the train relative to man =100/10 m/sec   =10m/sec.   =10x18/5km/hr   = 36 km/hr.   Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr.   x - 5 = 36 =41km/hr.   Answer:41
<result>E</result>
A train 100m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is: