Question

slant height and radius of a cone is 42m and 21m respectively then Calculate the total surface area and curved surface area​

Answer 1

explanation-

l=42m

r=21m

TSA of cone=πr(l+r)

=22/7×21(42+21)

=22×3(63)

=66×63

=4158m²

CSA of cone=πrl

=22/7×21×42

=22×3×42

=66×42

=2772m²

hopes it more helpful for u

Answer 2

Answer:

Step-by-step explanation:

RADIUS=21cm

SLANT HEIGHT=42cm

TSA=πrl+πr²

CSA=πrl

CSA=$\frac{22}{7}$×21×42

       =2772cm²

TSA=2772+$\frac{22}{7}$×21×21

       =2772+1386

        = 4158cm²

sorry for my slow typing

and hope it helps you!!!