Discussion of Question with ID = 093 under Problems-on-Trains

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Question

A train of length 129 m crosses a bridge at a speed of 60 km/h in 30 seconds. What is the length of the bridge?

A

371 meters.

B

500 meters.

C

450 meters.

D

600 meters.

Soln.
Ans: a

In 30 seconds the train covers a distance of 30 × 60 × (5/18) = 500 meters. This distance is the sum of the lengths of the train and the bridge. Subtracting the length of the train we get the length of the bridge = 500 - 129 = 371 meters.


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