Multiple choice

A 200 metre long train running at a speed of 72 km./hr. crosses a platform in 18 seconds, then the length of the platform is :

  1. 150 m.

  2. 170 m.

  3. 140 m.

  4. 160 m.

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

Train speed = 72 km/hr = 72 × 1000/3600 = 20 m/s. Distance covered in 18 seconds = Speed × Time = 20 × 18 = 360 m. This distance equals the train length plus platform length: 200 + Platform = 360. Therefore, Platform length = 360 - 200 = 160 m.

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