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An observer stands at a distance of 660 ...

An observer stands at a distance of 660 m from a cliff and fires a gun. After what time period will he hear the echo, if the sound travels at a speed of 330 m/s?

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To solve the problem of when the observer will hear the echo after firing a gun, we can follow these steps: ### Step 1: Understand the scenario The observer is standing 660 meters away from a cliff. When the gun is fired, the sound travels to the cliff and then reflects back to the observer. ### Step 2: Calculate the total distance traveled by the sound The sound has to travel to the cliff and back, which means it covers the distance to the cliff twice. Therefore, the total distance traveled by the sound is: \[ ...
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