Problems on Trains - Data Intensity 1 :: Discussion


2.A train 125 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?
A.55 km/hr
B.54 km/hr
C.50 km/hr
D.45 km/hr
Answer:  Option  C
Explanation:

Speed of the train relative to man = 125 m/sec
10
   = 25 m/sec.
2
   = 25 x 18 km/hr
2 5

   = 45 km/hr.

Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr.

 x - 5 = 45          x = 50 km/hr.

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Published by:Michael Daani

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