Question

Find the surface area of a sphere of radius 7 cm
​

Answer 1

Surface area of a sphere=

$4 \pi \: {r}^{2}$

Given:

r=7cm

therefore,

S.A. =

$4 \times \frac{22}{7} \times 7 \times 7$

$22 \times 28$

$616 \: cm$

Answer 2

Step-by-step explanation:

given that :

radius = 7cm

surface area of a sphere = 4πr^2

= 4 × 22/7 ×7×7

= 4×22×7

=88×7

=616sq. cm