The radius of a soap bubble is increasing at the rate of 0.2 cm/sec. It its radius is 5 cm, find the rate of increase of its volume.

Explanation

To solve the problem of finding the rate of increase of the volume of a soap bubble as its radius increases, we will follow these steps:

### Step 1: Understand the formula for the volume of a sphere
The volume \( V \) of a sphere is given by the formula:
\[ V = \frac{4}{3} \pi r^3 \]
where \( r \) is the radius of the sphere.
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