19-10-2017
Mathematics

contestada

The length of a rectangle is 4 ft longer than it’s width. If the perimeter of the rectangle is 28 ft, find it’s area.

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choixongdong choixongdong

19-10-2017

L = W + 4
P = 2(W + L)
28 = 2(W + W + 4)
14 = 2W + 4
2W = 10
W = 5
L = W + 4 = 5 + 4 = 9

A = L x W
A = 9 x 5
A = 45

answer
A = 45 ft^2

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