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Physics · Oct / Nov 2019 · Paper 12 · Question 28

5054Sound

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?

  1. A40 m / s
  2. B80 m / s
  3. C160 m / s
  4. D320 m / s

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Correct answer: D. 320 m / s

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