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    Question

    The length of the each side of an equilateral triangle

    is 42√3 cm . The area of circumcircle, (cm 2 ) is
    A 616 cm² Correct Answer Incorrect Answer
    B 2464 cm² Correct Answer Incorrect Answer
    C 3850 cm² Correct Answer Incorrect Answer
    D 5544 cm² Correct Answer Incorrect Answer

    Solution

    Area of circumcircle of a ∆ = πR 2   =π(a/√3) 2   = π (42√3/√3) 2    =π × 422   = 22/7 × 42 × 42 = 5544 cm 2  

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