For a sphere of radius 10 cm, What percent of the numerical value of its volume would be the numerical value of the surface area ?

Answer: Option C

Volume of the sphere :
$$=\left[\frac{4}{3}\pi {\left(10\right)}^3\right]\text{ c}{\text{m}}^3$$
Surface area of the sphere :
$$=\left[4\pi {\left(10\right)}^2\right]\text{ c}{\text{m}}^2$$
∴ Required percentage :
$$\begin{array}{rl}& =\left[\frac{4\pi {\left(10\right)}^2}{\frac{4}{3}\pi {\left(10\right)}^3}\times 100\right]\%\\ & =30\%\end{array}$$