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If the area of an equilateral triangle inscribed in the circle, x^2 + y^2 + 10x + 12y + c = 0 is 27√3 sq. units then c is equal to

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

(1) 13 

(2) 20 

(3) –25 

(4) 25

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The correct option is  (4) 25.

Explanation:

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