Multiple choice

Train A travelling with a speed of 90 km/hr crosses a 500 m long train B travelling in the opposite direction in 36 seconds. What is the length of train A?

  1. 500 metre

  2. 250 metre

  3. 600 metre

  4. Data inadequate

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

For two trains crossing in opposite directions, relative speed = sum of individual speeds. However, we only know train A's speed (90 km/hr) and train B's length (500 m). Without train B's speed, we cannot determine the relative speed or total distance covered in 36 seconds. Total distance = length_A + length_B, but we have too few unknowns.

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