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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-14

  • question_answer
    The area of a triangle is\[125\text{ }c{{m}^{2}}\]. If its base is increased by 20% and height by 10%, then what will be its changed area (in \[c{{m}^{2}}\])?         

    A)  155                             

    B)  165

    C)  150                             

    D)  180

    Correct Answer: B

    Solution :

     Let, b\[\to \] base and h\[\to \] height Area of triangle \[=\frac{1}{2}\times b\times h\,c{{m}^{2}}\] \[125=\frac{1}{2}\times b\times h\] or \[\frac{1}{2}bh=125\]              ..?.(i) New base \[=120%\] of \[b=1.20\text{ }b\] New height \[=110%\] of \[h=1.10\text{ }h\] New area \[=\frac{1}{2}\times (1.20\times 1.10)\,bh\] \[=1.20\times 1.10\times 125=\]


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