Answer to burning fuse puzzle

29 Aug

As a reminder …

You have two fuses, each of them will burn for exactly one hour. However, the rate of burning is not consistent, meaning that burning half of one of the fuses would not necessarily give half an hour.

How can you measure 45 minutes using these two fuses?

The answer …

Light one fuse at both ends and the other fuse at just one end. It will take 30 for the fuse lit at both ends to extinguish, at which point, you light the other end of the fuse you originally lit at just one end. It will then take a further 15 minutes for that fuse to extinguish… giving you 45 minutes.

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3 Responses to “Answer to burning fuse puzzle”

  1. Nick June 12, 2011 at 12:17 am #

    How do you know the fuse will take 30 minutes to burn when lit at both ends?

  2. pmnikkijamesn9 June 16, 2011 at 9:16 pm #

    Good website from Karry Robidoux

  3. TRACY BARNES November 7, 2011 at 8:51 am #

    Heyy!!!!

    That is so nice blog to help us. that nice to answer to burning fuse puzzle.

    Thank You

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