Multiple choice

A train running at a speed of 90 km/hr crosses a platform triple its length in 36 seconds. What is the length of the platform in meters?

  1. 600

  2. 775

  3. 225

  4. 675
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Speed = 90 km/hr = 25 m/s. Distance covered in 36 seconds = 25 × 36 = 900 m. This distance equals train length + platform length. Since platform is triple the train's length, total distance = train + 3×train = 4×train. So train length = 900/4 = 225 m. Platform length = 3 × 225 = 675 m, confirming the claimed answer D.

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