O-LevelPhysicsWaves5054/12 · Oct/Nov 2019 · Q281 Mark
A man stands 80 m in front of a cliff face. He makes a loud bang and listens for the echo. He makes a loud bang once every second. He hears an echo exactly halfway between the bang that caused it and the next bang. What is the speed of sound?
A40 m/s
B80 m/s
C160 m/s
D320 m/s
✓ Correct answer
D: 320 m/s
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