Question

Radius is equal to 9cm height is equal to 12 cm pi=3.14 find curved surface area of the cone

Answer 1

Answer:

Curved Surface area of cone is 141.3cm²

Step-by-step explanation:

Radius r=9cm

Height h=12 cm

slant height l=$\sqrt{h^{2}+r^{2} }$=$\sqrt{9^{2} +12^{2} }$=$\sqrt{225}$=15cm

pi=3.14

Curved Surface area of cone=pi*r*l

                                               =3.14*9*15

                                                =141.3cm²

Curved Surface area of cone is 141.3cm²