Question

surface аre of sphere=120 cm^ 2​

Answer 1

$Surface \: area \: of \: Sphere \: \\ = 4 \: \pi {r}^{2}$

$120 = 4 \times \frac{22}{7} \times {r}^{2}$

$120 = \frac{88}{7} \times {r}^{2}$

$120 \times 7 = 88 \times {r}^{2}$

$840 = 88 \times {r}^{2}$

$\frac{840}{88} = {r}^{2}$

$9.545 = {r}^{2}$

$r = \sqrt{9.545}$

$r = 3.088$