Train Drain

On my local railway track there is a tunnel which is 5 miles long. A train, which was 440 yards long, entered the tunnel at a speed of 50 miles per hour. How long did it take for the whole of the train to pass completely through the tunnel?

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December 14th, 2011 | Category: Automotive, Brain Riddle, Mathematical |  Email This Riddle

4 guesses to Train Drain

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• Jimmy Barcus

  December 15, 2011 at 12:50 PM

  6:18

• Jimmy Barcus

  December 15, 2011 at 12:51 PM

  6 mins 18 seconds, that is.

• Paul

  December 15, 2011 at 12:56 PM

  The length of the train is 440 yards = 1320 feet = .25 miles + the length of the tunnel 5 miles / 50 miles per hour = .105 x 60 minutes = 6.3 minutes 30% of 1 minute = 18 seconds so the answer is 6 minutes and 18 seconds.

• Dude

  December 15, 2011 at 7:48 PM

  6 minutes and 18 seconds is correct, Jimmy Barcus.

  The train has to effectively travel 5.25 miles at 50 mph. Time = Dist ÷ Speed = 5.25 ÷ 50 = 0.105 hours = 6.3 minutes = 6 minutes 18 seconds.

  You’re today’s winner.