Question

A rectangular garden of area 48 square feet is to be surrounded on three sides by a brick wall costing 20 dollars per foot, and on the fourth side by a fence costing 10 dollars per foot. Find the smallest amount of money that can be spent on materials.

Answer 1

$484.97.

Explanation:

For a minimum amount of wall/fencing the garden has to be a square.

That would make each side of the garden = √48 dollars.

So the smallest amount would be √48 * 3 * 20 +√48 * 10

= $484.97.