A source is producing 20 waves in 4 sec. The distance between a crest and a trough is 12 cm. Find
the wavelength

Explanation

To find the wavelength based on the information provided, we can follow these steps:

### Step 1: Understand the Definitions
- **Crest**: The highest point of a wave.
- **Trough**: The lowest point of a wave.
- The distance between a crest and a trough is given as 12 cm.

### Step 2: Relate Crest and Trough to Wavelength
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