Multiple choice general knowledge math & puzzles

The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:

  1. 200 m

  2. 225 m

  3. 245 m

  4. 250 m
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Train speed 45 km/hr = 45 × (5/18) = 12.5 m/s. In 30 seconds, distance traveled = 12.5 × 30 = 375 m. This equals train length + bridge length. Bridge length = 375 - 130 = 245 metres. Option B (225 m) or D (250 m) would result from arithmetic errors.

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