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A train 120 meters long is running at a rate of 54 km/hr. Time taken by the train to cross a tunnel 130 meters long is?

81/3 seconds
162/3 seconds
10 seconds
15 seconds

Correct Answer: 162/3 seconds

Explanation:

∵ Speed of the train = 54 x (5/18) m/sec = 15 m/sec
∴ Time taken by the train to cross the tunnel
= Time taken by it to cover (120 + 130) m
= (250/15) sec
= 16²/₃

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