Multiple choice general knowledge math & puzzles

A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?(Ans in secs)

  1. 40

  2. 42

  3. 45

  4. 48

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Total distance = 360m + 140m = 500m. Speed = 45 km/hr = 45 * (5/18) = 12.5 m/s. Time = Distance / Speed = 500 / 12.5 = 40 seconds. The distractors are incorrect calculations of the speed conversion or total distance.