How long will elapse between the moment the front of the train enters the tunnel and the moment the end of the..........

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A 275 yard long train, travelling at 60 mph, enters a tunnel of two and a half miles in length.

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 Aug 17, 2018

2.65625 minutes

Total length = 2.5 miles + 275 yards = 2.5 miles + 275/1760 miles= 2.65625 miles
Speed = 60 mph = 1 mile / minute
Time = 2.65625/1 minutes

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