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In a sphere of radius r, a right circula...

In a sphere of radius r, a right circular cone of height h having maximum curved surface area is inscribed. The expression for the square of curved surface of cone is

A

`2 pi^(2) rh ( 2rh + h^(2))`

B

`pi^(2) hr (2rh + h^(2))`

C

`2pi^(2)r(2rh^(2) - h^(3))`

D

`2pi^(2)r^(2) (2rh-h^(2))`

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