WBCS.LIVE practice question

Two trains of equal length are running on parallel tracks in the same direction at speeds of 46 km/hr and 36 km/hr respectively. The faster train completely passes the slower train in 36 seconds. What is the length of each train?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 50 meters
  2. 100 meters
  3. 75 meters
  4. 120 meters

Correct answer and explanation

Correct answer: 50 meters

Explanation: āœ… Correct Answer: A) 50 meters šŸ“š Explanation: Because the trains are moving in the same direction, their relative speed is 46 - 36 = 10 km/hr. To convert to m/s, multiply by 5/18: 10 Ɨ 5/18 = 25/9 m/s. The total distance covered is the sum of both train lengths (2L). Distance = Speed Ɨ Time, so 2L = (25/9) Ɨ 36. This gives 2L = 100. Therefore, the length of each train (L) is exactly 50 meters.