The ratio of amplitudes of two waves is 3 : 4. Find the ratio of their
loudness

Explanation

To solve the problem of finding the ratio of loudness given the ratio of amplitudes of two waves, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Relationship**: The loudness (L) of a sound is directly proportional to the square of its amplitude (A). This can be expressed mathematically as:
\[ L \propto A^2 \]
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