Ratio of two circumference of two circle is 8:15. What is the ratio of their radii
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the ratio of their radii is 8:15
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Circumference of smaller circle ÷ Circumference of bigger circle = 8 ÷ 15
(2×22÷7×r)÷(2×22÷7×R) = 8÷15
r÷R = 8÷15
r : R = 8 : 15
(2×22÷7×r)÷(2×22÷7×R) = 8÷15
r÷R = 8÷15
r : R = 8 : 15
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