I asked a very similar question a week ago.
I'm just finishing up my project and noticing my numbers don't match up.

What I have to do is write a formula for optimum volume of a cylinder under this condition

height- diameter is greater then 0

What I'm going to do is put in a different radius into this formula to get the largest volume.

What I had before was
pi*r^2*(180-2*pi*r)
I figured out that doesn't work.

Question

I asked a very similar question a week ago.
I'm just finishing up my project and noticing my numbers don't match up.

What I have to do is write a formula for optimum volume of a cylinder under this condition 

height- diameter is greater then 0

What I'm going to do is put in a different radius into this formula to get the largest volume.

What I had before was
pi*r^2*(180-2*pi*r)
I figured out that doesn't work.

anonymous · Answer

I'm pretty sure this is wrong. But would 
pi*r^2*(2r-2*pi*r) be correct?

anonymous · Answer

Hmm I think I may have actually gotten it.
pi*r^2*(2*pi*r-2r)

anonymous · Answer

Though I'm not too sure...