A rectangle’s length is twice it’s width.If the perimeter is 18cm,what are it’s dimensions?

Answer 1

Dimensions are

Length = 6 cm

Width = 3 cm

Perimeter of a rectangle = 2(Length) + 2(Width)

L = Length

W = Width

P = 2L + 2W

According to the information we

L = 2W

P = 18

18 = 2(2W) + 2W

18 = 4W + 2W

18 = 6W

Divide both sides by 6

3 = W

6 = 2W = L

Checking

P = 2L + 2W

18 = 2(6) + 2(3)

18 = 12 + 6

18 = 18

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