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one of them hour glass type riddles that make you go WHAAAA?
You have two fuses (a fuse is something you burn to eventually set off an explosive), one which burns 1 hour and one which burns 2 hours. The fuses do not burn at a constant rate, so, for example, the last few inches of the first fuse could take 5 minutes or 55 minutes to burn. You have as many matches as you want. With these fuses, you have to measure a time period of exactly 45 minutes. How do you do this?
3 Answers
- FreethinkerLv 61 decade agoFavorite Answer
Light both ends of the 1 hour fuse and one end of the 2 hour fuse. It will take 30 minutes for the 1 hour fuse to burn. At that time, light the other end of the second fuse. It will now take 45 minutes for the second fuse to burn out.
