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10-12-2017
Mathematics

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The length of a rectangle is six times its width. if the area of the rectangle is 216 ft2 , find its perimeter.

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Bored5274 Bored5274

10-12-2017

l = 6w
A = 216
A = lw
216 = (6w)(w)
216 = 6w^2
216/6 = w^2
36 = w^2
w = 6
l = 6(6)
l = 36
P = 2l + 2w
P = 2(36) + 2(6)
P = 72 + 12
P=84

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