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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-22

  • question_answer
    If the radius of a semicircle is reduced by 10%, then how much per cent its area will be reduced?

    A)  22                   

    B)  19   

    C)  21       

    D)  27

    Correct Answer: C

    Solution :

    Percentage decrease in area \[=-10-10-\frac{10\times 10}{100}=-21%\] -ve sign shows the reduction.


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