A boy is walking away from a well at a speed of `1.0 m//s` in a direction at right angles to the wall. As he walks, he below a whistle steadily. An observer towards whom the boy is walking hears `4.0` beats per second. If the speed of sound is `340 m//s` , what is the frequency of the whistle?

Explanation

To solve the problem, we need to find the frequency of the whistle (f) based on the information provided about the boy walking away from the well and the observer hearing beats.

### Step-by-step Solution:

1. **Understanding the Situation**:
- The boy is walking away from the well at a speed of \(1.0 \, \text{m/s}\).
- The observer is stationary and hears 4 beats per second.
- The speed of sound in air is \(340 \, \text{m/s}\).
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