Multiple choice

Two trains travelling in the same direction at 40km/hr. and 22km/hr. completely cross each other in 1 minute. If the length of the first train is 125mt. Find the length of the second train?

  1. $175 m$
  2. $560 m$
  3. $907 m$
  4. $200 m$
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A Correct answer
Explanation

Relative speed = 40-22 = 18 km/hr = 5 m/s. Distance covered in 1 minute (60s) = 5×60 = 300m. This equals sum of both train lengths. Length of second train = 300-125 = 175m.

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