Calculate the area of a rectangle if one side is three times longer than the other, and the perimeter of the rectangle is 16 cm.

Perimeter is the sum of the lengths of all sides. Let’s make an equation. Let one of the sides be equal to x. Then we get x + x + 3 x + 3 x = 16;

8 * x = 16; hence x = 16 ÷ 8 = 2. One side was found. The other is known to be three times longer. So it is equal to 3 * 2 = 6.

Now it will not be difficult to calculate the area by answering the question of the problem. The area of the rectangle is equal to the product of the length and the width. As a result, S = 2 * 6 = 12 cm square.

Answer: 12 cm ^ 2.