Question

Find the curved surface area of a right circular cone whose slant height is 10cm and base radius
is 7 cm.​

Answer 1

➣Answer

• Curved surface area of cone = 220 cm² .

➣ Given

• Slant height of cone = 10cm.

• Radius of cone = 7cm.

➢ To Find

• Curved surface area of the cone.

➣ Step By Step Explanation

Given that ⤵

• Radius of cone = 7 cm.

• Slant height of the cone = 10cm.

We need to find the curved surface area.

➠ Formula Used

$\underline{\boxed{ \sf{ \color{purple}{Curved \: Surface \: Area_{(Cone)} = \pi \: r \: l}}}}$

➠ By substituting the values

$\longrightarrow\tt\cfrac{22}{ \cancel7} \times \cancel 7 \times 10 {cm}^{2} \\ \\\longrightarrow\tt 22 \times 10 {cm}^{2} \\ \\ \longrightarrow\tt220 {cm}^{2}$

Therefore, Curved surface area of cone = 220 cm².

__________________________

Answer 2

${\large{\frak{\green{\dag{\underline{\underline{Given:}}}}}}}$

• Slant height = 10 cm
• Radius = 7cm

${\large{\frak{\orange{\dag{\underline{\underline{To \ Find : }}}}}}}$

• What is the C.S.A (Curved Surface Area) of cone

${\large{\frak{\blue{\dag{\underline{\underline{Formula \ Used}}}}}}}$

${\implies{\small{\bold {\underline{\boxed{ \red{ C.S.A_{(Cone)} = \pi r l}}}}}}}$

${\small{\bold{ \underline{Calculation \ Begins :-}}}}$

${\longmapsto{\sf{C.S.A_{(Cone)} = \pi r l}}}$

${\longmapsto{\sf{C.S.A_{(Cone)} = \dfrac{22}{\cancel{7}} × {\cancel{7 }}× 10 }}}$

${\longmapsto{\sf{C.S.A _{(Cone)} = 22 × 10 }}}$

${\purple{\leadsto{\frak{\underline{C.S.A_{(Cone)} = 220 cm^2}}}}}$