Question

area of a sphere whose diameter is 18.2

Answer 1

$\large \bold{ \underline{ \underline{ \: Answer : \: \: \: }}}$

$\to$ 1386 cm²

$\large \bold{ \underline{ \underline{ \: Explaination : \: \: \: }}}$

Radius (r) of sphere = 18.2 / 2 = 9.1 cm

Surface area of sphere = 4πr²

$\to 4 \times \frac{22}{7} \times {(9.1)}^{2} \\ \\ \to \frac{88}{7} \times 82.81 \\ \\ \to \frac{7287.28}{7} \\ \\ \to 1041.04 \: \: \bold{{cm}^{2} }$

Therefore , the surface area of a sphere having diameter 18.2 cm is 1041.04 cm²