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Lena [83]
3 years ago
7

3.1 Q19

Mathematics
1 answer:
IgorC [24]3 years ago
5 0
Let one length be x and the other be y

x + x + y + y = 440
2x + 2y = 440

Divide by 2 through ...
x + y = 220
y = 220 - x

Area = xy
Area = x(220 -x) = 220x - x^{2}

Given that that max length of x will be -b/2a
a = -1 b = 220
x = \frac{-220}{-2} = 110

x = 110
y = 220 - 110 = 110

Therefore max area = 110 x 110 = 12100 square yards


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