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The areas of two circles are in the ratio 9: 4. The ratio of their circumferences isa 3: 2b 4: 9c 2: 3d 81: 16
Solution
let radii be r1 and r2,
Ratio of areas = πr21πr22=94
= r21r22=94
= r1r2=√94=32
Ratio of circumference = 2πr12πr2=r1r2=32=3:2
Mathematics
Secondary School Mathematics X
Standard X