Aptitude Reasoning English GK Computer Knowledge Programming Skill Banking Software Testing

Question

A 600-meter long train crosses a platform in 78 seconds while it crosses a signal pole in 36 seconds. What is the length of the platform?

  • 200
  • 300
  • 500
  • 700
Answer- D

Speed = 600/36 m/sec = 50/3 m/sec.

Let the length of the platform be x meters.

Then, ( x + 600 )/78 = 50/3

=> 3x + 1800 = 3900

=> x = 700 m.