The plot is of rectangular shape and is surrounded by a fence, the length of which is 140m.

The plot is of rectangular shape and is surrounded by a fence, the length of which is 140m. What is the area of the site if its width is 30 m?

To solve this problem, it is necessary to remember that the length of the fence is the perimeter of the rectangle. Since the area of the rectangle is equal to the product of the width and the length, the area of the site can be expressed through the perimeter and the known width of the site by the following formula:

30 * ((140/2) – 30) = 30 * (70 – 30) = 30 * 40 = 1200 (m2);

Answer: the area of the plot is 1200 m2.