Wavelength of two notes in air is `(90 //175) m and ( 90//173) m`, respectively . Each pof these notes produces `4 beats//s` with a third note of a fixed frequency . Calculate the velocity of sound in air .

Explanation

To calculate the velocity of sound in air based on the given wavelengths and beat frequency, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Given Wavelengths:**
- The wavelengths of the two notes are given as:
\[
\lambda_1 = \frac{90}{175} \, \text{m} \quad \text{and} \quad \lambda_2 = \frac{90}{173} \, \text{m}
...