Multiple choice

A 1600 meter long train crosses a 900 meter long bridge in 100 seconds. What is the speed (in km / hr) of the train?

  1. $90$
  2. $100$
  3. $80$
  4. $85$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The train must travel its own length plus the bridge length to completely cross the bridge. Total distance = 1600 + 900 = 2500m = 2.5km. Time = 100 seconds = 100/3600 hours. Speed = Distance/Time = 2.5/(100/3600) = 90 km/hr.

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