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A Mile Long Train

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Two minutes. The back of the train would be at the beginning of the tunnel after 1 minute, and would leave the end of the tunnel at the 2 minute mark.


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1 Comment on "A Mile Long Train"


Jennel says
July 4, 2015 @ 22:04

2 minutes, the question is essentially how long does it take the end of the train to exit the tunnel starting the moment the front of the train enters the tunnel. the moment the front of the train enters the tunnel, the end of the train is 1 mile from the tunnel (the length of the train) and 1 mile from the end of the tunnel (on the other side), thus at one mile a minute (60 miles/hr) it would take 2 minutes.


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