This question is based on Heron's Formula :
In a triangle ABC, it is given that (s - a) = 5, (s - b) = 3, (s - c) = 1 where s is the semi perimeter and a, b, c are the sides of the triangle. If the area of the triangle is 3sqrt10 sq. units then the perimeter of the triangle is what???

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first, write down Heron's formula

\[Area = \sqrt{s(s-a)(s-b)(s-c)}\]

now fill in what you know (from the question)

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