The circumference of a rectangular piece of paper is 80cm, and the ratio of length to width is 5:3. If you cut it into the largest square piece of paper, what is the area of the square piece of paper?

The circumference of a rectangular piece of paper is 80cm, and the ratio of length to width is 5:3. If you cut it into the largest square piece of paper, what is the area of the square piece of paper?

The length of the rectangle: (80 △ 2) × 55 + 3 = 25 (CM); the width: (80 △ 2) × 35 + 3 = 15 (CM); the side length of the largest square paper cut is 15 cm, 15 × 15 = 225 (CM); a: the area of this square paper is 225 cm more