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How long does a train 110 meters long running at the speed of 72 km/hour take to cross a bridge 132 meters in length?

A. 15 seconds

B. 12.1 seconds

C. 10 seconds

D. 8.1 seconds

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Correct Answer : B.


Speed = 72 km/hour = 72*(5/18) m/sec
= 20 m/sec
Total distance to be covered = 110+132 = 142 meters
Time = Distance/Speed
= 242/20
= 12.1 seconds

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