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      Question

      A soldier hears the sound of a cannon that was fired 3 km

      away after 30 seconds. Calculate the speed of sound.
      A 150 m/s Correct Answer Incorrect Answer
      B 180 m/s Correct Answer Incorrect Answer
      C 100 m/s Correct Answer Incorrect Answer
      D 160 m/s Correct Answer Incorrect Answer

      Solution

      ATQ,

      Speed of sound

      = (3 × 1000) / 30

      = 3000 / 30

      = 100 m/s

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