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?

  1. 40

  2. 45

  3. 42

  4. 44

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

Total distance to cover is the length of the train plus the length of the bridge: $360 + 140 = 500$ meters. Speed is $45 imes (5/18) = 12.5$ m/s. Time = Distance / Speed = $500 / 12.5 = 40$ seconds. The other options are incorrect time calculations.