Multiple choice

A 150 meter long train running at a speed of 90 km/h crosses a platform in 18 seconds. What is the length of the platform?

  1. $250m.$
  2. $275m$
  3. $450m.$
  4. $300m.$

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Speed = 90 km/h = 90 × 5/18 = 25 m/s. Distance covered in 18 seconds = 25 × 18 = 450 m. This distance equals train length + platform length. Platform length = 450 - 150 = 300 m.

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