Question 1184717
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A rancher wants to build a rectangular pen with an area of &nbsp;100 &nbsp;{{{cross(m)}}} &nbsp;&nbsp;<U>m^2</U>. 
(a) Find a function that models the length of fencing required.
(b) Find the pen dimensions that require the minimum amount of fencing. 
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pay attention on how I corrected your post - - - it is &nbsp;VERY &nbsp;IMPORTANT &nbsp;CORRECTION &nbsp;(&nbsp;!&nbsp;)


<pre>
            How a person writes the dimension units, clearly shows 
            if he (or she) does understand what he (or she) writes.
</pre>


See the solution in the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/misc/Calculus-optimization-problems-for-shapes-in-2D-plane.lesson>Calculus optimization problems for shapes in 2D plane</A>,  &nbsp;&nbsp;Problem 4

in this site.


The answer is:  &nbsp;&nbsp;the pen should be a square with the side length of &nbsp;10 &nbsp;meters.