If the area of an equilateral triangle inscribed in the circle, x^{2}+y^{2}+10x+12y+c=0 is 27 sq. units then c is equal to :

If the area of an equilateral triangle inscribed in the circle, x^{2}+y^{2}+10x+12y+c=0 is 27 sq. units then c is equal to :

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