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

  • question_answer
    A person fires a gun infront of a building 167 m away. If the speed of sound is 334 m/s. Calculate the time in which he hears an echo.

    A)  0.2s                      

    B)  2s

    C)  1.0s       

    D)  0.1s

    Correct Answer: C

    Solution :

      \[d=167\text{ }m\] \[v=334\text{ }m/s\] \[t=?\] we know,\[t=\frac{2d}{v}=\frac{2\times 167}{334}=1.0\,s\]                        


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