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September 23, 2014

September 23, 2014

Posted by **Tom** on Friday, November 24, 2006 at 9:06pm.

so the perimeter is:

pi*r + 2r + 2h = 45.

h= (45 - PIr - 2r)/2

The area equals = (pi*r^2)/2 + 2rh

what do i do from here?

<<what do i do from here?>>

(1) Substitute your h(r) equation into the A (r,h) equation to express Area (A) in terms of r only.

(2) Then compute dA/dr and set it equal to zero.

(3) The solution will be the maximum-area value of r.

(4) Then substitute that r into the A(r) equation to get the maximum area.

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