Two tuning forks A and B produce 4 beats `//`sec. On loading B with wax, 6 beats `//` sec are heard. If quantity of wax is reduced, the number of beats per second again becomes 4.Find the frequency of B if the frequency of A is 256 Hz.

Explanation

To solve the problem, we need to analyze the information given about the tuning forks A and B and how their frequencies change with the addition and removal of wax.

### Step-by-step Solution:

1. **Identify the Given Information:**
- Frequency of tuning fork A, \( f_A = 256 \, \text{Hz} \)
- Beats produced when forks A and B are sounded together without wax: \( 4 \, \text{beats/sec} \)
- Beats produced when fork B is loaded with wax: \( 6 \, \text{beats/sec} \)
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