To answer this question, we need to remember that the perimeter of a rectangle is given by:
[tex]P_{\text{rectangle}}=2l+2w[/tex]Where
• l is the length of the rectangle.
,• w is the width of the rectangle.
If we have that:
• P = 286ft
,• w = 66ft
Then we have (without units):
[tex]P=2l+2w\Rightarrow286=2l+2(66)[/tex]Therefore
[tex]286=2l+132[/tex]Now, to solve for l, we need to subtract 132 from both sides of the equation, and then divide both sides by 2:
[tex]286-132=2l+132-132\Rightarrow154=2l\Rightarrow\frac{154}{2}=\frac{2l}{2}[/tex]Finally, we have:
[tex]l=\frac{154}{2}\Rightarrow l=77[/tex]Therefore, the length of the rectangular garden is equal to 77 feet.