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KVPY Sample Paper KVPY Stream-SX Model Paper-29

  • question_answer
    If the area of an equilateral triangle inscribed in the \[{{x}^{2}}+{{y}^{2}}+10x+12y+c=0\] is \[27\sqrt{3}\,sq.\] units then \[c\] is equal to:

    A) \[13\]

    B) \[20\]

    C) \[-25\]

    D) \[25\]

    Correct Answer: D

    Solution :

    \[r=\sqrt{25+36-c}=\sqrt{36}\] \[c=25.\]


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