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MGIMS WARDHA MGIMS WARDHA Solved Paper-2007

  • question_answer
    The intensity of sound gets reduced by 10% on passing through a slab. The reduction in intensity on passing through two consecutive slabs would be

    A) 20%                                       

    B) 19%

    C) 5%                                         

    D) 50%

    Correct Answer: B

    Solution :

    Reduction on passing through first slab =10% Reduction on passing through second slab \[=10%\text{ }of\text{ }90=9\] \[\therefore \]Total reduction \[=(10+9)%=19%\]


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