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Anettt [7]
3 years ago
6

A rectangular garden of area 75 ftö is bounded on three sides by a wall costing

Mathematics
1 answer:
ioda3 years ago
8 0
A = L * W = 75 so L = 75/W Cost = 4W + 8(2L + W) = 4W + 16L + 8W = 12W + 16L = 12W + 1200/W C' = (12(W^2 - 100))/(W^2) = (12(W-10)(W+10))/(W^2) so W = 10 then L = 7.5
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