A train 150 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) 36
B) 50
C) 88
D) 59
E) 22
Speed of the train relative to man   = (150/10) m/sec = 15 m/sec. [15 * (18/5)] km/hr   = 54 km/hr. Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr. x - 5   = 54 ==&gt; x   = 59 km/hr.   Answer:59
<result>D</result>
A train 150 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?