What will be the work done in blowing a soap bubble from a radius of 3 cm to a radius of 5 cm? The surface tension of soap solution is 40 dyne cm`""^(-1)`.

Explanation

To find the work done in blowing a soap bubble from a radius of 3 cm to a radius of 5 cm, we can follow these steps:

### Step 1: Understand the formula for work done
The work done (W) in blowing a soap bubble can be calculated using the formula:
\[ W = \gamma \cdot \Delta S \]
where:
- \( \gamma \) is the surface tension of the soap solution,
- \( \Delta S \) is the change in surface area of the bubble.
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