Question

If the volume in $c{m}^3$ and surface area in $c{m}^2$ of a sphere are numerically equal. Then the radius of the sphere (in cm) is:

• A. 2
• B. 3
• C. 4
• D. 5

Answer 1

Answer: (B)

Given, volume of sphere = surface area of sphere
$\Rightarrow \frac{4}{3}\pi r^3=4\pi r^2$
$\Rightarrow r=3$