There is a certain kind of rope which takes exactly one hour to burn from end to end. The rope is not uniform, not symmetric - thicknesses throughout its length vary randomly. No two such ropes will be identical.
You have two such ropes. How will you measure 45 minutes?
2007-03-09 20:08:50 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
same question 3 times awesome
light 1 rope on both ends. Light the second rope on one end. When the first rope finishes burning, 30 minutes will have passed (since you lit in on both ends)
immediately light the other end of the 2nd rope - it should have "30 minutes" of rope left, but since it is now burning on both ends, this should take 15 minutes.
Exactly 45 minutes have now passed. Problem solved
2007-03-09 20:17:50 · answer #1 · answered by Bill F 6 · 0⤊ 0⤋
challenging subject. try searching into yahoo and bing. that will might help!
2014-11-07 00:28:36 · answer #2 · answered by brian 3 · 0⤊ 0⤋
Please sell the two ropes and buy a clock.
2007-03-10 04:24:20 · answer #3 · answered by ERUM M 2 · 0⤊ 0⤋