A train 125 m long passes a man, running at 3 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is? Choose the correct choice from the following: A) 48 B) 50 C) 28 D) 26 E) 29
Speed of the train relative to man = (125/10) m/sec = (25/2) m/sec. [(25/2) * (18/5)] km/hr = 45 km/hr. Let the speed of the train be x km/hr. Then, relative speed = (x - 3) km/hr. x - 3 = 45 ==&gt; x = 48 km/hr   48nswer: 48
<result>A</result>
A train 125 m long passes a man, running at 3 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is?