Maximize Volume + Surface of a Cone that fits in a Sphere

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The purpose in this problem is to find the radius r and the height h of a cone that maximize the sum of the volume and the surface area of the cone in a sphere with radius R. The sum of these values is calculated as

      V+A = πr^2h/3+πr^2+πr√(h^2+r^2)

The optimization problem becomes:

 Maximize:       V+A = πr^2h/3+πr^2+πr√(h^2+r^2)

 Subject to             h<2R ,   r<R

I am not sure if the final form of the problem is correct or not. If it is correct, which algorithm can be applied to solve this optimization problem? Thanks.

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