Question

Find the surface area of the cone in terms of pi.


https://nnds-li.brainhoney.com/Resource/19791663,8AD/Assets/assessmentimages/geo%20part%202%20u3l10%203.jpg
230π cm2
260π cm2
800π cm2
none of these
@michele_laino

Answer 1

i got none of the above

Answer 2

the lateral surface is a surface of a circular sector, namely:

here:
C=2*pi*10=...?
L is given by the theorem of Pitagora:
\[L = \sqrt {{{24}^2} + {{10}^2}} = ...?\]