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8th Class Science Sound Question Bank Sound IIT JEE Subjective Problems

  • question_answer
    An observer stands at a distance of 850 m from a cliff and fires a gun. After what time gap will he hear the echo, if sound travels at a speed at \[350\text{ }m{{s}^{-1}}\]in air?

    Answer:

    We know, \[d=\frac{v\times t}{2}\Rightarrow t=\frac{2\times d}{v}=\frac{2\times 850}{350}=20\,s\]


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