Question

assuming the earth to be a sphere of radius 6370km find (¡) surface area of the earth

Answer 1

$4 \times \pi \times 6370 { }^{2} =$
509,904,363.78179

Answer 2

Surface Area of a Sphere
$= 4\pi {r}^{3}$
Radius = 6370km

$= 4 \times \frac{22}{7} \times {6370}^{3}$
= 812349538000km