In an open organ pipe, second harmonic is 400 Hz. Find the frequency of sixth harmonic.

Explanation

To solve the problem of finding the frequency of the sixth harmonic in an open organ pipe where the second harmonic frequency is given as 400 Hz, we can follow these steps:

### Step 1: Understand the relationship between harmonics and frequency
In an open organ pipe, the frequency of the nth harmonic can be expressed as:
\[ f_n = n \cdot \frac{V}{2L} \]
where:
- \( f_n \) is the frequency of the nth harmonic,
- \( n \) is the harmonic number,
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