The sum of the perimeter of a circle and square is k, where k is some constant. Prove that the(adsbygoogle = window.adsbygoogle || []).push({});

sum of their areas is least when the side of square is double the radius of the circle.

is this way correct?

assume that x is side of square and r is radius of circle

k=4x+2∏r

sum of areas=area of square+area of circle

find critical pt and find 2nd derivative to show its min.

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# Maxima and minima problem

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