Length: w + 2
width: w
A = L x w
143 = (w + 2)(w)
143 = w² + 2w
0 = w² + 2w - 143
0 = (w + 13)(w - 11)
0 = w + 13 0 = w - 11
Negative so disregard w = 11
Length: w + 2 = 11 + 2 = 13
Perimeter = 2L + 2w
= 2(13) + 2(11)
= 26 + 22
= 48
Answer: 48 ft
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