If n equal rain droplets falling through air with equal steady velocity of `10 cm s^(-1)` coalesce, find the terminal velocity of big drop formed.

Explanation

To find the terminal velocity of the big drop formed by n small rain droplets falling through air, we can follow these steps:

### Step 1: Understand the Volume Conservation
When n small droplets coalesce to form a larger droplet, the volume of the larger droplet will be equal to the total volume of the n small droplets.

**Hint:** Remember that the volume of a sphere is given by the formula \( V = \frac{4}{3} \pi r^3 \).

### Step 2: Calculate the Volume of One Small Droplet
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