# Math Help - Finding area and volume of double helix?

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

Hi,
How do you calculate the area and volume of a double helix??

2. ## 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"

3. ## confused

how can area and volume be the same???

4. ## 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)