The length of the rectangle is 15 cm, and the width is 3 times less. Find the area of a square

The length of the rectangle is 15 cm, and the width is 3 times less. Find the area of a square that has the same perimeter as the given rectangle.

1) What is the width of the rectangle? If … times less, then you need to divide.

15: 3 = 5 (cm).

2) What is the perimeter of the rectangle? The perimeter of a rectangle is the sum of the lengths of its sides.

P = 15 + 5 + 15 + 5 = 40 (cm).

3) What is the side of the square? All sides of a square are equal, so the perimeter must be divided into 4 sides.

40: 4 = 10 (cm).

4) What is the area of the square? The area of a square is equal to the product of its two sides.

S = 10 * 10 = 100 (cm ^ 2).

Answer. 100 cm ^ 2.