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Math Help - Finding area and volume of double helix?

  1. #1
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    Finding area and volume of double helix?

    Hi,
    How do you calculate the area and volume of a double helix??
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  2. #2
    MHF Contributor Mathstud28's Avatar
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    I would do this

    Say there are n "loops" the volume of one is V= pi\ r^2hn\ or the volume of a cylinder and to find area A= pi\ r^2hn\ where r is radius h is height and n is the number of "loops"
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  3. #3
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    confused

    how can area and volume be the same???
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  4. #4
    MHF Contributor Mathstud28's Avatar
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    You are right

    they can't be...I dont remember what I made a mistake on...I reasearched that one...so...I would say that my mistake is PROBABLY that Area=\pi{r^2}n...but that was a while ago so I am not sure...I know there is an equation but I forget it...I think its x=rcos(\theta),y=rsin(\theta),z=a\theta but I am unsure...if so you could use integration to find both area and volume! fun fun fun!!! yay! (Big Grin)
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