A pipe opened at both ends prpduces a note of frequency `f_(1)`. When the pipe is kept with `3/4th` of its length in water, it produces a note of frequency `f_(2)`.
The ratio `f_(1)/f_(2)` is

Explanation

To solve the problem, we need to find the ratio of the frequencies \( f_1 \) and \( f_2 \) produced by a pipe opened at both ends when it is partially submerged in water.

### Step-by-Step Solution:

1. **Understanding the Frequencies**:
- For an open pipe, the frequency of the fundamental mode is given by the formula:
\[
f = \frac{v}{2L}
...