The area of the base of a cone is 64 pi ...

The area of the base of a cone is `64 pi cm^2` while its slant height is 17 cm. This cone is remolded to obtain a solid sphere. The radius of this sphere will be:

A

`2 root (3)(30)` cm

B

`8 root (3)(30)` cm

C

6.5 cm

D

`2 root (3)(40)` cm

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