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?
2007-03-01 11:27:25 · 6 answers · asked by balla24n7 2 in Entertainment & Music ➔ Jokes & Riddles
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.
2007-03-01 11:32:35 · answer #1 · answered by amber ɹəqɯɐ 4 · 4⤊ 1⤋
get a timer and see how much the ropes burn after 45min. geez, i really dont know!
2007-03-01 19:34:14 · answer #2 · answered by STrawberry 3 · 0⤊ 1⤋
throw a grenade instead
2007-03-01 19:36:48 · answer #3 · answered by conan 4 · 0⤊ 1⤋
i really don't get this...oh well, i think other people got the answer.
2007-03-01 20:05:47 · answer #4 · answered by MSS 3 · 0⤊ 0⤋
Amber's answer is dead right. well done
2007-03-01 19:42:50 · answer #5 · answered by Dream_Catcher 4 · 0⤊ 0⤋
this aint a riddle....
it's more like a math problem...
2007-03-01 19:30:57 · answer #6 · answered by LOVE♥ 1 · 1⤊ 1⤋