A tuning fork `A` is in resonance with an air column ` 32 cm` long and closed at one end . When the length of this column is increased by `1 cm`,it is in resonance with another fork `B`. When `A and B` are sounded together , they produce `40 "beats in" 5 s`. Find their frequencies .

Explanation

To find the frequencies of the tuning forks A and B, we will follow these steps:

### Step 1: Understand the resonance condition
For a closed-end air column, the fundamental frequency \( f \) is given by the formula:
\[ f = \frac{v}{4L} \]
where \( v \) is the speed of sound in air, and \( L \) is the length of the air column.
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