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Depends on what "out of" means.

At 60 miles per hour (one mile per minute), a train entering a mile-long tunnel will first emerge one minute later.

But for the full one-mile length of the train to pass through the tunnel and exit will take another minute, totaling two minutes from the time the first car enters to the time the last car leaves.

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13y ago
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13y ago

8 mins! the train has to ravel 2 miles in total to completely get through the tunnel! 15miles takes 60 mins, therefore 2miles takes 8mins!!

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10y ago

It needs to travel 2 miles.

Time = Distance/Speed = 2/15 hours = 8 minutes.

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Q: How long will it take a mile long train going 15 miles per hour to get completely through a mile long tunnel?
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