CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2001

  • question_answer
    The equation of a circle with centre at (1, 0) and circumference 10 n unit, is:

    A)  \[{{x}^{2}}+{{y}^{2}}-2x+24=0\]

    B)  \[{{x}^{2}}+{{y}^{2}}-x-25=0\]

    C)  \[{{x}^{2}}+{{y}^{2}}-2x-24=0\]

    D)  \[{{x}^{2}}+{{y}^{2}}+2x+24=0\]

    E)  \[{{x}^{2}}+{{y}^{2}}-2y+24=0\]

    Correct Answer: C

    Solution :

    Let r be the radius of a circle \[\because \]     Circumference \[=10\pi \] \[\therefore \]  \[2\pi r=10\pi \Rightarrow \]\[r=5\]unit \[\therefore \]Equation of circle with centre at (1, 0) and radius 5 is, \[{{(x-1)}^{2}}+{{(y-0)}^{2}}=25\] \[\Rightarrow \]               \[{{x}^{2}}+{{y}^{2}}-2x-24=0\]


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