Calculate the velocity off sound in a gas in which two wavelength 204 cm and 208 cm produce 20 betas in 6 sec.

Explanation

To calculate the velocity of sound in a gas where two wavelengths produce beats, we can follow these steps:

### Step 1: Understand the relationship between frequency and wavelength
The frequency (f) of a wave is related to its wavelength (λ) and the velocity (v) of sound in the medium by the equation:
\[ v = f \cdot \lambda \]
Where:
- \( v \) is the velocity of sound,
- \( f \) is the frequency,
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