Question

If the volume in $cm^3$ and surface area in $cm^2$ 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)

3

Answer 2

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