Multiple choice

In how much time can a train of length 120 m running at 45 km/hr cross a platform of length 230 m?

  1. 36 s

  2. 28 s

  3. 24 s

  4. 18 s

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

Total distance = 120 + 230 = 350 m. Speed = 45 * 5/18 = 12.5 m/s. Time = 350 / 12.5 = 28 seconds.

AI explanation

To find the total time, divide the total distance by the train's speed using the formula time equals distance divided by speed. Convert the speed of 45 km/hr to 12.5 m/s by multiplying by 5/18. The total distance is 120 m plus 230 m, which equals 350 m, so the time taken is 350 divided by 12.5, yielding 28 seconds.

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