Multiple choice

A train having length 250 m. is running with the speed of 72 km/h, another train having length 300 m. come from opposite direction and crosses the first train in 25 sec. Find the speed of second train?

  1. 7.2

  2. 3.6

  3. 3.7

  4. 6.5

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Train 1: length = 250 m, speed = 72 km/h = 20 m/s. Combined length = 250 + 300 = 550 m. Time to cross = 25 sec. Relative speed = 550/25 = 22 m/s. If trains are opposite: 20 + v = 22 → v = 2 m/s = 7.2 km/h. Option A is correct. If same direction, v would be negative (impossible), so opposite is implied.

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