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9th Class Science Sample Paper Science Olympiad Model Test Paper-7

  • question_answer
    A construction worker's helmet slips and falls when he is 78.4 m above the ground. He hears the sound of the helmet hitting the ground 4.23 seconds after it slipped. Find the speed of sound in air.

    A) 330 m/s

    B)  336m/s

    C)  339 m/s

    D)  341 m/s

    E)  None of these

    Correct Answer: D

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