Multiple choice

A 130 m. long train running at the speed of 45 km./hr. crosses a bridge in 30 seconds. What is the length of the bridge?

  1. 200 m.

  2. 225 m.

  3. 245 m.

  4. 250 m.

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

Distance = speed * time. Speed: 45 km/hr = 45*(5/18) = 12.5 m/s. In 30 sec: 12.5*30 = 375 m. This equals train length + bridge length. Bridge = 375 - 130 = 245 m. Option C is correct.

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