SOLUTION: If the ratio of two areas of circle A+B is 4, what is the ratio of teh radii of A+B

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Question 682987: If the ratio of two areas of circle A+B is 4, what is the ratio of teh radii of A+B
Answer by mananth(16946) About Me  (Show Source):
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Area of circle A = pi*r1^2
Area of circle B = pi*r2^2

Area of circle A = pi*r1^2
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Area of circle B = pi*r2^2

4= r1^2/r2^2
r1/r2 = sqrt(4)
r1/r2= 2 (the positive value )