One of the sides of the rectangle is 3 times longer than the other, and its perimeter is 40 cm

univerkov | September 7, 2021 | education

One of the sides of the rectangle is 3 times longer than the other, and its perimeter is 40 cm, found on the sides of the rectangle.

1) Let the short side of the rectangle be x centimeters. Then the long side will be equal to 3 * x centimeters.

2) Since the perimeter of the rectangle is equal to the sum of all sides, we can write the following expression 40 = 2 * (x + 3 * x) or 40 = 8 * x. Hence x = 40/8 = 5 (cm).

3) Knowing x, we can determine the long side 3 * x = 3 * 5 = 15 (cm).

Answer: the short side of the rectangle is 5 centimeters, the long side is 15 centimeters.

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