The area of the rectangle is 18 cm2. The width of the rectangle is 3 cm. find the perimeter of the rectangle.
| March 31, 2021 | education
Let a and b be the length and width of the rectangle. By the condition b = 3 cm.The area of the rectangle is determined by the formula
S = a * b,
whence its length is
a = S / b = 18/3 = 6 cm.
The perimeter of a rectangle is determined by the formula
P = 2 * (a + b) = 2 * (6 + 3) = 18 cm.
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