Multiple choice

A train passes two bridges of length 210 m. and 122 m in 25 second and 17 seconds respectively .The length and speed of the train will be respectively?

  1. 65 m, 39.6 km/hr.

  2. 65 m, 39 km/hr.

  3. 64 m, 39.6 km/hr.

  4. 64 m, 39 km/hr.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Let train length be L and speed be S. For Bridge 1: L+210 = 25S. For Bridge 2: L+122 = 17S. Subtracting gives 88 = 8S, so S = 11 m/s = 39.6 km/hr. Substituting: L = 17×11 - 122 = 187 - 122 = 65m. Option A (65m, 39.6 km/hr) is correct.

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