The length of a rectangle is twice its width.
If the perimeter of the rectangle is 42 ft, find its length and width.
Let the width of the rectangle be represented as "w" and the length be represented as "2w".
The perimeter of a rectangle is given by the formula:
Perimeter = 2(length + width)
Given that the perimeter is 42 ft:
42 = 2(2w + w)
42 = 2(3w)
42 = 6w
w = 7
Therefore, the width of the rectangle is 7 ft and the length is 2w = 2(7) = 14 ft.
So, the length of the rectangle is 14 ft and the width is 7 ft.