The perimeter of the rectangular garden is 60 feet. Is the length of the garden is twice the width, what are the dimensions of the garden.

let the wigth = x

then the length = 2x

You can get

2· (2x+x) = 60

2· (2x+x) : 2=60:2

2x+x=30

3x=30

x=10

So 2x=2*10=20

The width of the garden is 10 feet, the length is 20 feet and the area is 200 square feet.