Question

7. 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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Answer 1

Answer:

1 sec because see

he fire 660

Answer 2

Answer:

2 seconds

Explanation:

As you see sound travels at 330 M/S meters per second

so 660 m / 330m/s = 2 so 2 seconds

convert this into km/h

=== 7.3  km/h hope this helps lol