9th Class Science Sample Paper Science Olympiad Model Test Paper-21

  • question_answer
    An observer standing between two cliffs blows a whistle and hears two successive echoes at  2 s and 3 s. Calculate the distance between the cliffs (speed of sound in air\[=\text{ }340\text{ }m/s\]):

    A) 600 m

    B) 850 m

    C) 980 m

    D) 750 m

    E) None of these

    Correct Answer: B

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