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SSC Sample Paper Mock Test-1 SSC CGL Tear-II Paper-1

  • question_answer
    The length and breadth of a square are increased by 40 % and 20%, respectively. Find the difference of area the rectangle so formed to the original square

    A) 56%                 

    B)  57.5%  

    C)  65%                            

    D)  68%

    Correct Answer: D

    Solution :

    Let length \[=100\,\,m\]and breadth \[=100\,\,m\] Area of square\[={{(100)}^{2}}=100000\,\,{{m}^{2}}\] New length \[=140\,\,m,\]New breadth\[=120\,\,m\] New area \[=(140\times 120)\,\,{{m}^{2}}=16800\,\,{{m}^{2}}\] Increase in area\[=16800-10000=6800\,\,{{m}^{2}}\] Increase percentage \[=\left( \frac{6800}{10000}\times 100 \right)%=68%\]


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