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The slant height of a right circular con...

The slant height of a right circular cone is 10 cm and its height is 8 cm. It is cut by a plane parallel to its base passing through the midpoint of the height. Ratio of the volume of the cone to that of the frustum of the cone cut is

A

`2:1`

B

`3:2`

C

`4:3`

D

`8:7`

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