Multiple choice

A train $225$ m long ,travelling at a uniform speed of $54$ km/hr. How much time will it take to pass a bridge $105$ m long ?

  1. $22$ sec
  2. $32$ sec
  3. $20$ sec
  4. $15$ sec
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A Correct answer
Explanation

Total distance = 225 + 105 = 330 m. Speed = 54 km/hr = 54 * 5/18 = 15 m/s. Time = 330 / 15 = 22 seconds.

AI explanation

The total distance to cross the bridge is the sum of the train's length and the bridge's length, so 225 meters plus 105 meters equals 330 meters. The speed of 54 kilometers per hour converts to 15 meters per second using the 5/18 factor. Dividing 330 meters by 15 meters per second yields a time of 22 seconds.

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