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    Question

    The length of the each side of an equilateral triangle

    is 63√3 cm . The area of circumcircle, (cm 2 ) is
    A 9856 cm² Correct Answer Incorrect Answer
    B 154 cm² Correct Answer Incorrect Answer
    C 7546 cm² Correct Answer Incorrect Answer
    D 12474 cm² Correct Answer Incorrect Answer

    Solution

    Area of circumcircle of a ∆ = πR 2   =π(a/√3) 2   = π (63√3/√3) 2    =π × 632   = 22/7 × 63 × 63 = 12474 cm 2  

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