Question

If the numerical value of surface area of a sphere is equal to its volume, then the radius of the sphere is:

• A. $1$
• B. $3$
• C. $5$
• D. $4.7$

Answer 1

The correct option is B $3$

$4\pi r^2=\frac{4}{3}\pi r^3$
$or1=\frac{r}{3}$
$orr=3$