A tuning fork A of frequency 256 Hz when sounded with tuning fork B of unknown frequency produces 4 beats/s. When B is loaded with wax, 6 beats/s were heard. If some of the wax is reduced, the number of beats again reduces to 4 beats/s. Determine the initial frequency of B.

Explanation

To determine the initial frequency of tuning fork B, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Known Values:**
- Frequency of tuning fork A, \( f_A = 256 \, \text{Hz} \)
- Beat frequency with tuning fork B, \( f_B \) (unknown), produces 4 beats/s.
- When tuning fork B is loaded with wax, the beat frequency increases to 6 beats/s.
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