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 sec. The speed of the train is?
Choose the correct answer.
A) 40 B) 50 C) 60 D) 79 E) 48
Speed of the train relative to man = 125/10 = 25/2 m/sec.   = 25/2 * 18/5= 
<gadget id="calculator">25/2 * 18/5</gadget>
<output>45</output>
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.   Answer: Option 48
<result>E</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 sec. The speed of the train is?