The sum of the side length of a square and the width of a rectangle is 20 cm, the perimeter of a square is one and one third of the perimeter of a rectangle, and the width of a rectangle is 4 / 5 of the length. How much is the area of the square and rectangle and the fact How much is the area sum of square and rectangle?

The sum of the side length of a square and the width of a rectangle is 20 cm, the perimeter of a square is one and one third of the perimeter of a rectangle, and the width of a rectangle is 4 / 5 of the length. How much is the area of the square and rectangle and the fact How much is the area sum of square and rectangle?

Rectangle circumference = (W + L) * 2 = 3.6 * l
Square perimeter = rectangle perimeter * 4 / 3
=3.6 * 4 / 3 * length = 4.8 * length
Square side length = square perimeter / 4 = 1.2 * length
Square side length + width = 1.2 * length + 0.8 * length = 2.0 * length = 20
Length = 20 / 2.0 = 10
Width = 0.8 * length = 8
Square side length = 1.2, length = 12
Square area = 12 * 12 = 144
Rectangle area = 10 * 8 = 80