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8th Class Science Sound Question Bank Sound Conceptive Objective Problems

  • question_answer
    A boy standing 70m from a high wall claps his hands. After how much time is an echo heard? (The speed of sound in air is\[350\text{ }m{{s}^{-1}}\])

    A)  4 s                         

    B)  0.4 s   

    C)  104 s                    

    D)  1.2 s

    Correct Answer: B

    Solution :

      Not Available


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