Multiple choice

A train crosses another train in 10 sec. Find out the lengths of the trains. A. Ratio between the lengths of the second and first train is 4: 5. B. Ratio between the speed of first and second trains is 1: 2. C. The speed of the first train is 36 km/hr

  1. Only A and B together

  2. Only B and C together

  3. Only A and C together

  4. Questions can’t be answered even after using all the information

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

We have ratios (length and speed) and individual train speeds, but never the total distance covered while crossing. We need either: (relative speed × time) = sum of lengths, or a specific length value. Neither is provided. Even with all statements, we cannot find the lengths.

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