posted on May, 30 2011 @ 05:25 AM
reply to post by VictorVonDoom
I`m only using pi as 3.142 as I dont have it on my calculator,just an office type.
And I know its the same thing but I looked at it as a cylinder not a disc.
Volume of a cylinder
formula =pi x r2 x hieght
volume of the inner cylinder was 73804.04mm
volume of the total cylinder (including the coating) was 78550mm
Minus the inner from the total =4745.98mm volume of the coating
Had fun though cheers.
Edit to add............
Duh I`ve had a computer for 17 odd years and just remembered its got a calculator on it
So same process using the pi key I got 4745.3272mm
("pi key" lol any English about?)
edit on 30-5-2011 by gps777 because: (no reason given)