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.
Answer: Option C
:
C
Given:
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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:
C
Given:
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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