Question

The curved surface area of a right circular cone whose slant height is 14 cm and base radius is 21 cm is

Answer 1

$height \: of \: cylinder \: = 14cm$

$radius \: of \: base \: = 21cm$

$its \: curved \: surface \: area$

{CSA of cylinder = 2πrh}

$2 \times \frac{22}{7} \times 21 \times 14 \\ = 1848cm {}^{2}$

So

$its \: curved \: surface \: area \: is \: 1848cm {}^{2}$

Answer 2

Question:-

The curved surface area of a right circular cone whose slant height is 14 cm and base radius is 21 cm is

$\huge\underline{\underline\mathtt\color{hotpink}Answer}$

Given:-

• slant height of cone = 14cm
• Radius of base = 21cm

To find:-

• Curved surface area of right circular cone

__________________

➦ Curved surface area of cone = πrl ( π × radius × length)

$➻ \large \: \frac{22}{7} \times 14 \times 21$

➻ 924 cm²

------------------------

• Curved surface area of right circular cone is 924cm².

___________________

More to know about cone:-

➳ Cone is a 3D shape having circular base and narrowed smoothly towards the point.

➳ A right circular cone is one whose axis is perpendicular to plane of base.

Other formulas of cone:-

➦ Curved surface area of right circular cone = πrl

➦ Total surface area of right circular cone = π ( r + l ) r

➦ Volume of a right circular cone = 1/3π r²h