Question

Diameter of the base of a cone is 21 cm and its slant height is 12 cm find its curved surface area

Answer 1

Given :

diameter= 21cm

= 21/2

= 10.5cm
Slant height= 12 cm

We know that,

Curved Surface area of cone=
$\pi \: rl$
: 3.14 x 10 .5 x 12

: 395.64cm^square.

:

Answer 2

hope u understand...