The perimeter of the plot is 40 dm. what is the area if the width is 4 times less than its length.

The perimeter of the rectangle is calculated by the formula P = 2 * (a + b), where a, b are the length and width of the rectangle.
Since, according to the condition of the problem, the length of the rectangle is 4 times greater than the width, denoting the width by the variable x, we can express the length through x as 4 * x. Since the perimeter of the site is known, we substitute the values in the formula and find the length and width of the site.
40 = 2 * (x + 4 * x)
5 * x = 40/2
5 * x = 20
x = 20/5 = 4 dm size of the width of the site.
4 * 4 = 16 dm is the length of the section.
Multiplying the length of the site and the width, we find its area.
16 * 4 = 64 dm2
Answer: The area of the plot is 64 dm2.