The perimater of the garden is P=60 feet
The length is twice its width.
Let "x" represent the measure of the width of the garden, then:
w=x
l= 2x
The formula to calculate the perimeter is:
![P=2w+2l](https://img.qammunity.org/2023/formulas/mathematics/college/gpuh5jkz5qmjnfrixwjvd1tfe9tqk98jbp.png)
Replace it with the determined equalities, and you get that the perimeter of the garden is equal to:
![60=2x+2(2x)](https://img.qammunity.org/2023/formulas/mathematics/college/nh9964g3hr1fdmpkmu2ilqp4h0rwjylnwr.png)
From this expression you can calculate the value of x
![\begin{gathered} 60=2x+4x \\ 60=6x \\ (6x)/(6)=(60)/(6) \\ x=10 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/ij28b453sp8csqoyyd9yi3x2a0d5ibe287.png)
w=x=10 feet
l=2x=2*10=20 feet
The width of the garden is w=10 feet and the length of the garden is l=20 feet