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CMC Medical CMC-Medical Ludhiana Solved Paper-2008

  • question_answer
    The error in the measurement of radius of the sphere is 0.3%. What is the permissible error in its surface area?

    A)  0.6%                                    

    B)  1.2%

    C)  1.8%                                    

    D)  2.4%

    Correct Answer: A

    Solution :

                    Area \[(A)=4\pi {{r}^{2}}\] \[\therefore \]  \[\frac{\Delta A}{A}=2\frac{\Delta r}{r}\] \[\therefore \]  \[\frac{\Delta A}{A}=2\times 0.3=0.6%\]


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