two circles have areas in the ratio 36:49.find the ratio of their circumference
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pi*r1^2 / pi* r2^2 = 36 /49
r1/ r2 = 6/7
so ratio of circumference = 2pi *r1 / 2pi*r2 = 12pi / 14pi = 12/14
r1/ r2 = 6/7
so ratio of circumference = 2pi *r1 / 2pi*r2 = 12pi / 14pi = 12/14
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