Question

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

Answer 1

$4\pi {r}^{2}$
=4×22/7×9×9
=7128/7
=1018.29 cm²

Answer 2

HEY HERE IS U R ANSWER
D=18CM
SO R=9CM
THE SURFACE AREA OF SPHERE IS 4PIE R^2
THEREFORE BY SUBSTITUTING THE VALUES WE GET 4×314/100×9×9
SO U R ANS IS 1017.36