Question

The slant height of a cone is 8.45cm

Answer 1

$\bf \underline{ \underline{Given : }}$

• Slant height,l = 8.45 cm

• Diameter of base = 14 cm

$\bf \underline{ \underline{To \: be \: calculated : }}$

Calculate the curved surface area of the cone .

$\bf \underline{ \underline{Formula \: applied : }}$

Curved surface area of cone = πrl

$\bf \underline{ \underline{Solution : }}$

First of all,

Radius = Diameter/2

=> Radius,r = 14/2

=> Radius,r = 7 cm

Now,

$\sf{Curved \: surface \: area \: of \: cone =\pi rl}$

$\sf \: \implies \: \dfrac{22}{ \cancel7} \times \cancel7 \times 8.45$

$\sf\implies22 \times 8.45$

$\sf \implies 185.9 \: {cm}^{2}$

Hence,the Curved surface area of cone is 185.9 cm².