The ratioof the radii of two circle is 3:7. calculate ratio of their circumference
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Answer: 6:7
Step-by-step explanation:vcircumference of circle=2 pi r
value of pi = 22/7
ratio of radius=3:7
let ratios be3x and 7x each
so ratio of their circumferences=2 X22/7 X3x/2X22/7X7x
so ans = 6/7
=6:7
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