Answer:
The width is 10 feet and the length is 20 feet.
Explanation:
2 * l + 2 * w= P
where l = length, w = width, and P = perimeter. From the problem we know that the perimeter, P = 60 feet. The length of the rectangle can be related to the width of the rectangle by the formula l = 2*w since we are told the length is twice the width. We can substitute the values for perimeter and length that e have extrapolated from the problem into the formula for perimeter of a rectangle. The equation becomes:
2*2*w+2*w=60 feet
We can solve by simplifying the left side.
4*w+2*w=60 feet
6*w=60 feet
w=10 feet
Now, to solve for length, we can plug the value for width into the equation:
l =2*w
l = 2* 10 feet
l=20 feet