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| There are two lengths of rope.
Each one can burn in exactly one hour.
They are not necessarily of the same length or width as each other.
They also are not of uniform width (may be wider in middle than on the end), thus burning half of the rope is not necessarily 1/2 hour.
By burning the ropes, how do you measure exactly 45 minutes worth of time? THE UNITED KINGDOM / OCT 4, 2006 5:31 PM EST |
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asd THE UNITED STATES / SEP 17, 2008 8:18 AM EST |
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i'd use the ropes to hang myself its too hard AUSTRALIA / FEB 3, 2008 4:44 AM EST |
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fold one of the rope to make it half the length.and fold the other rope to make it one fourth of its length.then burn the first rope and when it is fully burnt,lit the other one.first one will take half an hour and second one will take 15 mins.thus making it 45 mins. INDIA / FEB 3, 2008 4:30 AM EST |
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asdasd / MAR 7, 2007 8:48 PM EST |
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tujhejyjytjjhehahtrhtrjhrtj THE UNITED KINGDOM / FEB 20, 2007 11:50 AM EST |
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Dont know THE UNITED KINGDOM / JAN 12, 2007 8:45 AM EST |
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got no idea THE UNITED KINGDOM / JAN 8, 2007 9:11 AM EST |
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dfkjbvdf'xbxvc'bxcv'bmxcv'bmxcvbxgcdxfgsd AUSTRALIA / NOV 10, 2006 11:58 PM EST |
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fold in half burn then at the same time THE UNITED STATES / NOV 1, 2006 10:03 AM EST |
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vgbnvcnvnvbn / OCT 30, 2006 4:21 PM EST |
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By using your freaking watch. THE UNITED KINGDOM / OCT 4, 2006 6:45 PM EST |
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If you light both ends of one rope, it will burn in exactly a 1/2 hour. Thus, burn one rope from both ends and the other rope from only one end. Once the one rope (which is burning from both ends) finally burns out (and you know a 1/2 hour has elapsed), you also know that the other rope (which is buring from only one end) has exactly 1/2 hour left to burn. Since you only want 45 minutes, light the second end of the rope. This remaining piece will burn in 15 minutes. Thus, totaling 45 minutes. THE UNITED KINGDOM / OCT 4, 2006 5:42 PM EST |
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burn them from both sides ۩ THE UNITED STATES / OCT 4, 2006 5:35 PM EST |
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I'll take my chances, if that's ok with you. BELGIUM / OCT 4, 2006 5:33 PM EST |
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say wahhat / OCT 4, 2006 5:33 PM EST |
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with a clock / OCT 4, 2006 5:32 PM EST |