The width of the rectangle is 30% of its perimeter and the length is 2.5 cm. Find the area of the rectangle.

find the width of the rectangle. if the width is 30% of the perimeter, then two widths are 60%. therefore, two lengths make up the remaining 40% and one length 20%. accordingly, you can make a proportion: 5 (sum of lengths) refers to 40% as X (sum of widths) refers to 60%. therefore, X (sum of widths) = 300/40 = 7.5. means one width = 7.5 / 2 = 3.75. area = product of width and length, so area = 3.75 * 2.5 = 9.375cm ^ 2
Answer: 9.375 cm ^ 2