The radii of two concentric circles are 6cm and 4cm. Find the ratio of their ratios.
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6
10 cm are correct answer
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15
the ratio will be 9 : 4
because phi is same then 6^2/4^2
36/16
then ratio 9:4
because phi is same then 6^2/4^2
36/16
then ratio 9:4
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