Hi All,

Could someone please help me with what I am doing wrong with this optimization problem?...

Code:

A rancher wants to fence in an area of 2000000
square feet in a rectangular field and then
divide it in half with a fence down the middle
parallel to one side. What is the shortest
length of fence that the rancher can use?

My Work..

Code:

2000000 = ab ---> b = 2000000/a
L = 3a + 2b = 3a + 4000000/a
0 = L' = 3 - 4000000 / a^2
**a** = **3651.48ft**
**b** = 4000000/ 3651.48 = **1095.45ft**
Lmin = 3(3651.48) + 2(1095.45) =!? * ***13145.3ft**

Any help is appreciated! I was following along with this example:

http://www.mathhelpforum.com/math-he...n-problem.html

-M