Question

Calculate the volume of a sphere whose radius is $3\text{cm}$.

• A. $36\pi {\text{cm}}^3$
• B. $56\pi {\text{cm}}^3$
• C. $36\pi {\text{cm}}^3$
• D. $46\pi {\text{cm}}^3$

Answer 1

The correct option is A $36\pi {\text{cm}}^3$

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

Where, $r=radius$

Given:

$r=3\text{cm}$

Substitute the value of $r$ in the above formula,

$\frac{4}{3}\pi r^3=\frac{4}{3}\times 3.14\times 3^3$

$=\frac{4}{3}\times 3\times 3\times 3\times \pi$

$=\frac{4}{3}\times 27\times \pi$

$=\frac{108}{3}\times \pi$

$=36\pi {\text{cm}}^3$