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Question

A 300 meters long train running at the speed of 150 kmph crosses another train running in the opposite direction at the speed of 100 kmph in 10 seconds. What is the length of the other train?

  • 620
  • 530
  • 410
  • 390
Answer- D

Relative speed = (150 + 100) km/hr

= 250 x 5/18 m/sec

= 625/9 m/sec.

Let the length of the other train be x meters.

Then, (x + 300)/10 = 625/9

9x + 2700 = 6250

x = 394.4