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Question

A 60 m long train moving on a straight level track passes a pole in 5 seconds, find the speed of the train and the time it will take to cross a 540 m long bridge.


  1. 15 m/s, 65 s

  2. 13 m/s, 40 s

  3. 25 m/s, 30s

  4. 12 m/s, 50s


Solution

The correct option is D

12 m/s, 50s


Speed of the train =Length of the trainTime taken to cross the pole=605 m/s=12 m/s

Now, distance to be covered to cross a 540 m long bridge
=Length of the train + Length of the bridge
= 60 m + 540 m = 600 m

Hence, time taken =distancespeed
= 60012 s = 50 s

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