A closed box with a square base is to have a volume of 40 cubic meters. The material for the top and bottom of the box costs $2 per square meter, and the material for the sides costs $4 per square meter. Express the construction cost of the box as a function of the length of its base, x.

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The Answer of A closed box with a square base is to have a volume of 40 cubic meters. The material for the top and bottom of the box costs $2 per square meter, and the material for the sides costs $4 per square meter. Express the construction cost of the box as a function of the length of its base, x.

A Closed Box with a Square Base Is to Have