Practice | Hashtable

1. 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 ?

A. 24%

B. 26.5%

C. 30%

D. 45%

Solution:

Volume of the sphere :

= [\frac{4}{3} π {(10)}^{3}] c m^{3}

Surface area of the sphere :

= [4 π {(10)}^{2}] c m^{2}

∴ Required percentage :

\begin{aligned} = [\frac{4 π {(10)}^{2}}{\frac{4}{3} π {(10)}^{3}} \times 100] % \\ = 30 % \end{aligned}

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