Multiple choice

A train of length 50 m is moving with a constant speed of 10 m/s.Calculate the time taken by the train to cross an electric pole and a bridge of length 250 m.

  1. 25 sec

  2. 30 sec

  3. 45 sec

  4. 15 sec
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B Correct answer
Explanation

To cross a pole, the train covers its own length: 50 m / 10 m/s = 5 seconds. To cross a bridge, it covers its length plus the bridge length: (50 + 250) m / 10 m/s = 300 m / 10 m/s = 30 seconds.

AI explanation

To cross the electric pole, the train must cover a distance equal to its own length, which requires 50 / 10 = 5 seconds. When crossing the 250 m bridge, the total distance to cover is the sum of the train's length and the bridge's length, amounting to 50 + 250 = 300 m. Using the formula time equals distance divided by speed, the time taken to cross the bridge is 300 / 10 = 30 seconds.

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