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Question

A 60 m long train moving with constant speed on a straight level track passes a pole in 5 s. The time it will take to cross a 540 m long bridge is:
  1. 50

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Solution

The correct option is A 50
Given:
Length of the train =60 m
Length of the bridge =540 m
Time taken to cross the pole =5 s

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
60012s =50 s

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