1.

The volume of a sphere of radius ‘r’ is obtained by multiplying its surface area byA) 4/3B) r/3C) 4r/3D) 3r

Answer»

Correct option is: B) \(\frac{r}{3}\)

Volume of sphere of radius r = \(\frac 43 \pi r^3\) 

\(\frac r3 \times 4 \pi r^2\) 

\(\frac r3 \times \) surface area of sphere

Hence, the volume of sphere of radius 'r' is obtained by multiplying its surface area by  \(\frac r3 \)

Correct option is: B) \(\frac{r}{3}\)



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