Question

If the numerical value of surface area and 3 times of volume of a sphere is same , then what is the radius of the sphere ?? Plz help ....

Answer 1

surface area of sphere = 3 × volume of sphere

4πr^2 = 3 × 4/3 πr^3

=》 r^2 = r^3

=》 1 = r^3 / r^2

=》 1 = r = radius of sphere