The ratio of the radii of two circles is 3,7calculate ratio of their circumference
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let the radio be 3x and 7x
circumference of 1st circle =2*22/7*3x
circumference of 2nd circle=2*22/7*7x
ratio =circumference of 1st circle upon circumference of 2nd circle = 3:7
circumference of 1st circle =2*22/7*3x
circumference of 2nd circle=2*22/7*7x
ratio =circumference of 1st circle upon circumference of 2nd circle = 3:7
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