Question

find the surface of a sphere whose radius is 11cm

Answer 1

surface area of sphere
$4\pi {r}^{2}$
$4 \times 22 \ \div 7 \times 11 {}^{2}$
1521.142857 cm^2
is the answer .......

Answer 2

SURFACE AREA OF A SPHERE = 4πr²
R=11 CM
⇒SURFACE AREA= 4*22/7*11*11=10648/7
=1521.14 CM²