# A 440 yard long train, travelling at 60 mph, enters a one mile long tunnel. How long will elapse between the moment.....

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A 440 yard long train, travelling at 60 mph, enters a one mile long tunnel.
How long will elapse between the moment the front of the train enters the tunnel and the moment the end of the train clears the tunnel?

posted Feb 14, 2017

Answer : 1 minute and 15 sec.

Train is .25 mile long; traveling 60 miles per hour.
so; the front of the train will take 1 min to reach to the end of the tunnel. Body of the train is 1/4 mile; it will take 15 seconds to clear the tunnel.

answer Feb 14, 2017

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