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SSC MTS 2020 · PYQ · Speed, Distance and Time · medium

Two trains of the same length are running on parallel tracks in the same direction at 44 km/h and 32 km/h. The faster train passes the other train in 72 seconds. What is the length (in m) of each train?

Answer

The correct answer is D: 120. Relative speed = 44−32 = 12 km/h = 12×(5/18) = 10/3 m/s. Distance covered = 2l = (10/3)×72 = 240 m.

  1. A.100
  2. B.135
  3. C.75
  4. D.120✓ Correct

Explanation

Relative speed = 44−32 = 12 km/h = 12×(5/18) = 10/3 m/s. Distance covered = 2l = (10/3)×72 = 240 m. So each train's length = 120 m.
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