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The radius of a sphere is equal to th...

The radius of a sphere is equal to the radius of the base of a right circular cone, and the volume of the sphere is double the volume of the cone. The ratio of the height of the cone to the radius of its base is (a) 2 : 1       (b) 1 : 2      (c) 2 : 3      (d) 3 : 2

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