Josh built his little brother a rectangular sandbox.  The perimeter of the sandbox is 30 feet and the length is twice the width. What is the width of the sandbox? Let's think step by step and output the final answer after "####".
user
There are four sides to a rectangle, the width is W and so the length is 2W, and we can put that in this equation: W + W + 2W + 2W = 30 feet.
If we add the sides together, we get 6W = 30 feet.
To find W, we divide both sides by 6, like this: 6W / 6 = 30 feet / 6, so W = 5 feet.
#### 5
Josh built his little brother a rectangular sandbox.  The perimeter of the sandbox is 30 feet and the length is twice the width. What is the width of the sandbox?
train