Find the area of a rectangle if its perimeter is 80 cm and the sides are 2: 3.

univerkov | November 19, 2020 | education

Let x be the coefficient of proportionality, then the sides are equal:
(2x + 3x) * 2 = 80; 10x = 80; x = 8
The sides are equal: 20 and 30 cm;
Area of the rectangle: S = a * b;
S = 30 * 20 = 600.

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