The volume of a spherical balloon being inflated changes at a constant rate. If initially its radius is 3 units and after 3 seconds it is 6 units. Find the radius of the balloon after `t` seconds.

Explanation

To find the radius of the balloon after `t` seconds, we will follow these steps:

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