A submarine emits a sonar pulse, which returns from an underwater cliff in `1.02 s`. If the speed of sound in water is `1531 m//s`, how far away is the cliff ?

Explanation

To solve the problem of finding the distance to the underwater cliff based on the sonar pulse emitted by the submarine, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Scenario**:
- A submarine emits a sonar pulse that travels to an underwater cliff and reflects back. The total time taken for the pulse to return is given as 1.02 seconds.

2. **Identify the Total Distance**:
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