Question

If the volume in $m^3$ and the surface area in $m^2$ of a sphere are numerically equal, then the radius of the sphere in m is

• A. 4
• B. 2
• C. 3.5
• D. 3

Answer 1

The correct option is D 3

Let the radius of the sphere be $r$.

Since, the volume and surface area of the sphere are equal.

Therefore,

$4\pi r^2=\frac{4}{3}\pi r^3$

$r=3m$

Hence, this is the answer.