An observer stands at a certain distance away from a cliff and produces a loud sound. He hears the echo of the sound after 1.8 s. Calculate the distance between the cliff and the observer if the velocity of sound in air is `340ms^(-1)`.

Explanation

To solve the problem, we need to calculate the distance between the observer and the cliff based on the time it takes for the sound to travel to the cliff and back. Here’s a step-by-step solution:

### Step 1: Understand the Problem
The observer produces a sound that travels to the cliff and then reflects back to the observer. The total time taken for this round trip is given as 1.8 seconds.

### Step 2: Identify the Speed of Sound
The speed of sound in air is given as 340 meters per second (m/s).

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