Find the following :
Distance petween the 1st compression and the fifth subsequent rarefaction in a longitudinal wave if the wavelength of the wave is 20 cm.

Explanation

To solve the problem of finding the distance between the 1st compression and the 5th subsequent rarefaction in a longitudinal wave with a wavelength of 20 cm, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Wave Structure**:
- In a longitudinal wave, compressions and rarefactions alternate. A compression is followed by a rarefaction, and then another compression follows the rarefaction.

2. **Identify the Positions**:
...