Mathematics, 18.03.2021 02:40 bnvghnbbb

A rectangular box has a base and four vertical sides but no top. L = length, W = width, H = height of the box. The sum of the length, width and height is 7. Express the total area of the base and four sides of the box in terms of L and W Answer is a(L+W)+bLW +c(L2 +W2)
with a =? b = ? c = ?
What should L, W, H be to give the largest total area ? L= ? W=? H=?

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A rectangular box has a base and four vertical sides but no top. L = length, W = width, H = height o...