The perimeter of a rectangle is 66 dm the length of one side is 3.11 perimeter. Find the area of the rectangle.

Find one of the sides of the rectangle:

a = 66 * 3/11 = 18 dm;

Let’s write down the formula for finding the perimeter and express the length of the second side:

P = 2 (a + b);

2 (18 + b) = 66;

18 + b = 33;

b = 33-18;

b = 15 dm;

Let’s write down the formula for finding the area of a rectangle:

S = a * b;

Substitute the known values and calculate the area:

S = 15 * 18 = 270 dm2.

Answer: 270 dm2.




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