An open organ pipe of length `11 cm` in its fundamental mode vibrates in resonance with the first overtone of a closed organ pipe of length `13.2 cm` filled with some gas . If the velocity of sound in air is `330 m//s`, calculate the velocity of sound in the unknown gas .

Explanation

To solve the problem, we need to find the velocity of sound in an unknown gas using the resonance condition between an open organ pipe and a closed organ pipe.

### Step-by-Step Solution:

1. **Identify the properties of the pipes:**
- Length of the open organ pipe (L1) = 11 cm = 0.11 m
- Length of the closed organ pipe (L2) = 13.2 cm = 0.132 m
- Velocity of sound in air (C) = 330 m/s
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