The height of a solid cone is 12 cm and the area of the circular base is 64 \lbrack 22/7\}cm 2 . A planeparallel to the base of the cone cuts through the cone 9 cm above the vertex of the cone, the area of the base of the new cone so formed is

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The height of a solid cone is $12 c m$ and the area of the circular base is $64 π c m^{2}$ .A plane parallel to the base of the cone cuts through the cone $9 c m$ above the vertex of the cone, the area of the base of the new cone so formed is

Q. The height of a solid cone is 12 cm and the area of the circular base is 64

π

cm². A plane parallel to the base of the cone cuts through the cone 9 cm above the vertex of the cone, the areas of the base of the new cone so formed is

(a) 9

π

cm²

(b) 16

π

cm²

(c) 25

π

cm²

(d) 36

π

cm²

Q. A right circular cone is of height

3.6

cm and radius of its base is

1.6

cm . It is melted and recasted into a right circular cone with radius of its base

1.2

cm. Find the height of the cone so formed.

Q. The surface area of a solid metallic sphere is 616 cm². It is melted and recast into a cone of height 28 cm. Find the diameter of the base of the cone so formed (Use π = 22/7).

The height of a cone is 40 cm. A small cone is cut off at the top by a plane parallel to the base. If the volume of the small cone be $\frac{1}{64}$ of the volume of the given cone, at what height ( in cm) above the base is the section made ?

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