The area of the rectangle is 63 cm2. Find its perimeter if one side is 7 cm long.

To solve this problem, we use the formula for finding the area of a rectangle.
S = ab;
S = 63 cm ^ 2;
a = 7 cm;
The length of the second side is denoted by x cm.
b = x cm;
Using these expressions, we substitute them into the formula for the area.
63 = 7 * x;
To find an unknown factor, the product must be divided by a known factor.
X = 63: 7;
X = 9;
b = 9 (cm);
Find the perimeter of the rectangle using the formula:
P = 2 (a + b);
P = 2 (7 + 9) = 2 * 16 = 32 (cm);
Answer: The perimeter of this rectangle is 32 centimeters.

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