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  3. TWCP OTD - 23th ofMarch, 2017

TWCP OTD - 23th ofMarch, 2017

Scheduled Pinned Locked Moved The Lounge
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  • Kornfeld Eliyahu PeterK Offline
    Kornfeld Eliyahu PeterK Offline
    Kornfeld Eliyahu Peter
    wrote on last edited by
    #1

    BURN THEM It is an old one... We have two ropes. Both will burn exactly one hour from one end to other, but they both burn at uneven space as it may be that one will burn half the length in 10 minutes and the other half in the remaining 50 minutes... The question is how to measure 45 minutes with these two ropes? The answer is that set fire on both end of the ropes will half the burning time... My problem is that the answer is seems to contradict the 'burn at uneven space' part, but never saw a proof of it, as it was trivial... Can you prove it?

    Skipper: We'll fix it. Alex: Fix it? How you gonna fix this? Skipper: Grit, spit and a whole lotta duct tape.

    "It never ceases to amaze me that a spacecraft launched in 1977 can be fixed remotely from Earth." ― Brian Cox

    J M P G V 5 Replies Last reply
    0
    • Kornfeld Eliyahu PeterK Kornfeld Eliyahu Peter

      BURN THEM It is an old one... We have two ropes. Both will burn exactly one hour from one end to other, but they both burn at uneven space as it may be that one will burn half the length in 10 minutes and the other half in the remaining 50 minutes... The question is how to measure 45 minutes with these two ropes? The answer is that set fire on both end of the ropes will half the burning time... My problem is that the answer is seems to contradict the 'burn at uneven space' part, but never saw a proof of it, as it was trivial... Can you prove it?

      Skipper: We'll fix it. Alex: Fix it? How you gonna fix this? Skipper: Grit, spit and a whole lotta duct tape.

      J Offline
      J Offline
      Joseph Richter
      wrote on last edited by
      #2

      Light first rope on both ends. Because it doesn't burn evenly, the flames may not meet in the middle but the entire rope will still burn in 30 minutes. Sell second rope and buy a cheap watch. Drop cheap watch from top of Dubai towers. Due to updraft, it will take exactly 45 minutes for the watch to hit the ground. Plus or minus 44 minutes.

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      • Kornfeld Eliyahu PeterK Kornfeld Eliyahu Peter

        BURN THEM It is an old one... We have two ropes. Both will burn exactly one hour from one end to other, but they both burn at uneven space as it may be that one will burn half the length in 10 minutes and the other half in the remaining 50 minutes... The question is how to measure 45 minutes with these two ropes? The answer is that set fire on both end of the ropes will half the burning time... My problem is that the answer is seems to contradict the 'burn at uneven space' part, but never saw a proof of it, as it was trivial... Can you prove it?

        Skipper: We'll fix it. Alex: Fix it? How you gonna fix this? Skipper: Grit, spit and a whole lotta duct tape.

        M Offline
        M Offline
        Mark_Wallace
        wrote on last edited by
        #3

        <Atypical MW reply>

        (It's "uneven rates", by the way.) The trouble is that the uneven-rates thing adds a random element to the equation, so there is no way to solve it except by statistics -- but with a sample of only two, any statistical analysis would be untrustworthy.

        </Atypical MW reply> <Much more typical MW reply>

        You can't, because you had to burn them already, to prove that they took an hour.

        </Much more typical MW reply>

        I wanna be a eunuchs developer! Pass me a bread knife!

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        • Kornfeld Eliyahu PeterK Kornfeld Eliyahu Peter

          BURN THEM It is an old one... We have two ropes. Both will burn exactly one hour from one end to other, but they both burn at uneven space as it may be that one will burn half the length in 10 minutes and the other half in the remaining 50 minutes... The question is how to measure 45 minutes with these two ropes? The answer is that set fire on both end of the ropes will half the burning time... My problem is that the answer is seems to contradict the 'burn at uneven space' part, but never saw a proof of it, as it was trivial... Can you prove it?

          Skipper: We'll fix it. Alex: Fix it? How you gonna fix this? Skipper: Grit, spit and a whole lotta duct tape.

          P Offline
          P Offline
          PIEBALDconsult
          wrote on last edited by
          #4

          Even Bing will find suitable explanations.

          1 Reply Last reply
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          • Kornfeld Eliyahu PeterK Kornfeld Eliyahu Peter

            BURN THEM It is an old one... We have two ropes. Both will burn exactly one hour from one end to other, but they both burn at uneven space as it may be that one will burn half the length in 10 minutes and the other half in the remaining 50 minutes... The question is how to measure 45 minutes with these two ropes? The answer is that set fire on both end of the ropes will half the burning time... My problem is that the answer is seems to contradict the 'burn at uneven space' part, but never saw a proof of it, as it was trivial... Can you prove it?

            Skipper: We'll fix it. Alex: Fix it? How you gonna fix this? Skipper: Grit, spit and a whole lotta duct tape.

            G Offline
            G Offline
            Gary R Wheeler
            wrote on last edited by
            #5

            Tie the two ropes together. Make a hangman's noose in one end of the ropes. Throw the other end over a stout branch of a tree and tie it off. Place the OP on a horse beneath the tree. Place the noose around his/her/it's/their neck. Whack the horse on the ass.

            Software Zen: delete this;

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            • Kornfeld Eliyahu PeterK Kornfeld Eliyahu Peter

              BURN THEM It is an old one... We have two ropes. Both will burn exactly one hour from one end to other, but they both burn at uneven space as it may be that one will burn half the length in 10 minutes and the other half in the remaining 50 minutes... The question is how to measure 45 minutes with these two ropes? The answer is that set fire on both end of the ropes will half the burning time... My problem is that the answer is seems to contradict the 'burn at uneven space' part, but never saw a proof of it, as it was trivial... Can you prove it?

              Skipper: We'll fix it. Alex: Fix it? How you gonna fix this? Skipper: Grit, spit and a whole lotta duct tape.

              V Offline
              V Offline
              virang_21
              wrote on last edited by
              #6

              I guess you can do it with only one rope unless I understood it wrong ( English is not my first language ). 1. Fold the rope in half and mark the mid point. 2. Fold the thinner end of the rope in half to mark the mid point of that section. 3. Start burning from both end until you reached midpoint of thinner end. 4. Putout fire. By that time rope's thicker end will have burned to mark 5 minute. 5. Start burning from midway mark done in step 1 until whole rope is gone. ( That is 45 minutes ) Something I tried to do on paper. [^]

              Zen and the art of software maintenance : rm -rf * Maths is like love : a simple idea but it can get complicated.

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