A train 120 m 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:  Choices.
A) 22	B) 48.2	C) 99	D) 288	E) 12
Speed of the train relative to man = (120/10) m/sec = (12) m/sec. [(12) * (18/5)] km/hr = 43.2 km/hr. Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr. x - 5 = 43.2 ==&gt; x = 48.2 km/hr.Answer: 48.2
<result>B</result>
A train 120 m 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: