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SSC Sample Paper SSC-CGL TIER - I Sample Test Paper-1

  • question_answer
    The base of a triangle is increased by 10%. To keep the area unchanged the height of the triangle is to be decreased by:

    A)  \[9\frac{1}{11}%\]       

    B)  \[11\frac{1}{9}%\]

    C)  11%                

    D)  9%

    Correct Answer: D

    Solution :

     Base Height Area (Base x Height) Initial\[\to \]100 \[100\to 10000\] New \[\to \]110 \[x\to 10000\] \[\therefore \,\,\,x=\frac{10000}{110}=90.90\] \[\therefore \]   % decrease in height \[=10090.90\Rightarrow 9.09\approx 9%\]


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