Question

find the total surface area of a sphere of diameter 21​

Answer 1

Step-by-step explanation:

please mark as a brainlist answer

Answer 2

13266

Step-by-step explanation:

area of sphere is 4πr2

then d is equal to r by 2 so

r=21/2=10.5

now apply formula to solve

4πr2

=4(22/7)10.5(10.5)

=88/7(1055.25)

=13266cm2