Question

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

A
13 ms1, 40 s
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B
15 ms1, 65 s
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C
12 ms1, 50 s
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D
25 ms1, 30 s
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Solution

## The correct option is C 12 ms−1, 50 sGiven: Length of the train, D=60 m, Time taken to cross the pole, T=5 s, Length of the bridge =540 m Speed of the train, s=DT Speed of the train, s=605=12 ms−1 Now, distance to be covered to cross a 540 m long bridge is sum of Length of the train and Length of the bridge. d=60+540=600 m ∴Time taken=ds Time taken=60012=50 s ∴ Speed of the train is 12 ms−1 and the time it will take to cross the bridge is 50 s.

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