Question

4. If volume and surface area of Sphere are equal then radius of the sphere is

Answer 1

Answer:

Let r be the radius of the sphere.

and Volume of a sphere = surface area of the sphere

⇒ 4 / 3πr3 = 4πr2

⇒ r = 3 cm

Answer 2

$\frac{4}{3} \pi {r}^{3} = 4\pi {r}^{2}$

$\frac{r}{3} = 1$

$r = 3$