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The volume of a right circular cone, who...

The volume of a right circular cone, whose radius of the base is same as one-third of its altitude, and the volume of a sphere are equal. The ratio of the radius of the cone to the radius of the sphere is:

A

`root (3)(3): root (3)(2)`

B

`1:1`

C

`root (3)(4):1`

D

`root (3)(4): root (3)(3)`

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