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Question

A train 150 m long passes a man, running at 10 km/hr in the same direction in which the train is going, in 20 seconds. The speed of the train is?

  • 31
  • 33
  • 35
  • 37
Answer- D

Speed of the train relative to man = (150/20) = 15/2 m/sec

=15/2 x 18/5 km/hr = 27 km/hr.

Let the speed of the train be x km/hr. Then, relative speed = (x - 10) km/hr.

x - 10 = 27

x = 37 km/hr.