If the area of an equilateral triangle inscribed in the circle x2 + y2 + 10x + 12y + c = 0 is $27\sqrt 3 $ sq units then c is equal to :

Question

If the area of an equilateral triangle inscribed in the circle x² + y² + 10x + 12y + c = 0 is $27\sqrt 3 $ sq units then c is equal to :

$-$ 25

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