Question

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

Answer 1

Radius of the sphere, r = 7 cm

∴ Surface area of the sphere, S = $4\mathrm{\pi }{r}^2=4\times \frac{22}{7}\times {\left(7\right)}^2$ = 616 cm²

Thus, the surface area of sphere is 616 cm².