Question

the radius of a cone is 8 and the height is 2 what is the curved surface of the cone​

Answer 1

HEYA MATE !

R= 8cm

H=2cm

CSA = πr²+πrl

l²=r²+h²

l²=8²+2²

l²=64+4

l=√68

l=8.24cm approx

πr(r+l)

22/7×8(8+8.24)

hope it helps

Life☯️Love❤️Peace☮️

Answer 2

Answer:

To find out the Curved surface area of a cone.

• Firstly we have to multiple base radius of the cone by π
• Then we have to multiple it with its slant height (l).

So the formula for CSA of cone is

πrl

Given=>

Base radius = 8 unit

Height = 2 unit.

Slant height (l) = X

To find out slant height

We have to apply Pythagoras theoram.

$x = \sqrt{ {r}^{2} + {h}^{2} }$

$x = \sqrt{ {2}^{2} + {8}^{2} }$

$x = \sqrt{4 + 64 } \\ x = \sqrt{68}$

x = 8.24 unit

CSA =

$\frac{22}{7} \times 8 \times 8.24$

CSA of cone = 207.177sq unit