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The radius of the base of a right circul...

The radius of the base of a right circular cone is r. It is cut by a plane parallel to the base at aheight h from the base. The slant height of the frustum is `sqrt(h^2+4/9r^2)`. Show that the volume of13the frustum is `13/27 pi r^2 h`.

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NAGEEN PRAKASHAN-VOLUME AND SURFACE AREA OF SOLIDS-Exercise
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