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  9. Q107

RRB NTPC 2022 · Question 107 of 110

A train running at 90 km/h crosses an electric pole in 18 seconds and a platform in 65 seconds. What is the length of the platform?

  1. A1175 mCorrect
  2. B1250 m
  3. C1050 m
  4. D1020 m

Answer: A. 1175 m

Explanation

Let the length of the platform be P meters. 90 km/h = 90 ÷ 18/5 = 25 m/sec Hence, the length of the train = 25 × 18 = 450 meters. According to the question, 25 × 65 = (450 + P) ⇒ 1625 = 450 + P ⇒ P= 1175 The length of the platform is 1175 m.

Source: RRB NTPC 2022 CBT 2 Previous Year Paper (12-June-2022) — ixambee compilation with answer key · reliable-secondary

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