Question

find the curved surface area of right circular cone whose start height is 10cm base diameter is 7cm​

Answer 1

Curved surface area =πrl

22/7×7×10=220cm^2

Answer 2

$\large\bf\underline\red{Given \: :- }$

• Height = 10cm
• Diameter = 7cm

$\large\bf\underline\red{To \: find \: :- }$

• Area of right circular cone

$\large\bf\underline\red{Solution \: :- }$

Required Formula

$\large\boxed{\sf \: Area \: of \: right \: circular \: cone = \pi \: r \: l \: }$

• π = 22/7
• r = diameter/2
• l = slant height

Information about right circular cone

• A right circular cone is a cone where the axis of the cone is the line meeting the vertex to the midpoint of the circular base. That is, the centre point of the circular base is joined with the apex of the cone and it forms a right angle.

Required Solution

$\bf\implies{A = \frac{22}{7} \times 10 \times 3.5} \\ \bf\implies{A = \frac{22}{7} \times 35} \: \: \: \: \: \: \: \: \: \: \: \\ \bf\implies{A = 22 \times 5} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \bf\implies{A = 110cm {}^{2} } \: \: \: \: \: \: \: \: \: \:$

Area is 110cm²