Physicsmedium · Past Paper
A person claps their hands near a high wall and hears an echo after 2 seconds. If the speed of sound is 340 m/s, how far is the wall?
A170 m
B340 m
C680 m
D85 m
✓ Correct Answer: B — 340 m
Distance = (Speed * Time) / 2. Distance = (340 * 2) / 2 = 340 meters.
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