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Railways PYQCBT 1 2016

RRB NTPC · Question 10

A train running at a speed of 126 km/h crosses a car running at a speed of 72 km/h in 40 seconds when both are running in the same direction. What will be the length of the train in meters? A. 500 meters B. 600 meters C. 900 meters D. 450 meters

  1. D

  2. B

  3. C

  4. A

Show answer & explanation

Answer: (B) B

Explanation

In the same direction, the relative speed = 126 − 72 = 54 km/h = 15 m/s. Treating the car as a point, length of train = 15 × 40 = 600 m.