Question

what is Tsa of the cone whose height and radius is 21​.....pls pls pls pls pls answer!!

Answer 1

Answer:

Given: Height of the cone = 21cm

           Radius of the cone = 21cm

To find: Total Surface Area of the cone.

Solution:

Total Surface Area of the cone = $\pi$$r^{2}$ + $\pi$rs

                                                   = $\pi$r(r+s)

                                                   = 22/7 * 21 (21 + 21)

                                                   = 22 * 3 (42)

                                                   = 2772 cm