From:Michael Page <Michael.Page@sci.monash.edu.au>Organization:Department of Mathematics, Monash UniversityDate:13 Oct 95 01:30:20References:1 2 3 4

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Jon Ward <Jon_Ward@blibble.demon.co.uk> wrote: >This question reminds me of a classic mathematics/physics problem, which >I believe is worth considering : > >I lay a rope around a great circle of the globe. I then lay a second rope >around the same great circle, but the second rope is ten metres above the >ground all the way around. > >How much longer is the second rope? 2*pi*(r+10m) - 2*pi*r = 2*pi*10m \approx 62.8m >Once you have the answer, consider the fact that the last trans-Atlantic >flight I flew on cruised at 37,000 ft above sea-level. That's less than ten extra miles compared to the distance if the earth was flat. A minute amount compared to that travelled. So? Michael