Question

If the volume of a sphere is divided by its surface area, the result is 27 cm. the radius of the sphere is

Answer 1

volume of sphere / surface are of  sphere = 27 cm
4/3πr^3  / 4πr^2 = 27
r/3 = 27
r = 81 cm

Answer 2

Answer:

The radius of sphere is 81 cm

Step-by-step explanation:

Volume of sphere = $\frac{4}{3} \pi r^{3}$

Surface area of sphere = $4\pi r^{2}$

Now we are given that If the volume of a sphere is divided by its surface area, the result is 27 cm

So, $\frac{\frac{4}{3} \pi r^{3}}{4\pi r^{2}} =27$

$\frac{4}{12} r=27$

$r=27\times \frac{12}{4}$

$r=81$

Hence the radius of sphere is 81 cm.