Question

what will be the surface area of a sphere whose diameter is 18cm ?

Answer 1

Surface area = 4πr²
Radius=9 cm
4×3.14×9×9
=1017.36 cm²

Answer 2

SURFACE AREA  OF  SPHERE=4πR^2
DIAMETER=18
RADIUS =9
SURFACE AREA=4*3.14*9^2
=1017.36