Multiple choice

A train 200 m long running at 36 kmph takes 55 seconds to cross a bridge. The length of the bridge is

  1. 375 m.

  2. 300 m.

  3. 350 m.

  4. 325 m.

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

The train travels at 36 kmph, which is 10 m/s. In 55 seconds, it covers a total distance of 550 meters, which includes both the length of the train and the bridge. Subtracting the 200 m train length from the 550 m total gives 350 m for the bridge.

AI explanation

First, convert the train's speed from 36 kmph to meters per second by multiplying by 5/18, giving a speed of 10 m/s. The total distance traveled in 55 seconds is 10 m/s x 55 seconds = 550 m. This total distance is the sum of the train's length and the bridge's length, so the bridge's length is 550 m - 200 m = 350 m. The result is 350 m.

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