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 20:11:10 · 4 answers · asked by mike 1 in Science & Mathematics ➔ Mathematics
awesome i guess ill answer the same question again
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 20:17:21 · answer #1 · answered by Bill F 6 · 2⤊ 0⤋
I know these ropes :
thwist two together and their burning time will be half an hour.
so you do 4 together for 15 minutes , and 2 together for 30 minutes.
2007-03-10 04:17:09 · answer #2 · answered by gjmb1960 7 · 0⤊ 0⤋
It must be hemp dude!!!!
You have to either be high or need to be high to think this deep.
2007-03-10 04:29:33 · answer #3 · answered by John K 3 · 0⤊ 0⤋
complex aspect. query on to yahoo and bing. this could help!
2014-11-07 00:28:23 · answer #4 · answered by Anonymous · 0⤊ 0⤋