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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §3.2 Maximum and Minimum Problems, #39 · Calculus · Optimization

A wire four feet long is cut in two pieces

A wire four feet long is cut in two pieces. One piece forms a circle of radius $r$ , the other forms a square of side $x$ . Choose $r$ to minimize the sum of their areas. Then choose $r$ to maximize.

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §3.2 Maximum and Minimum Problems, #39

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