the circumferance of two circles are in the ratio 1:3 .find the ratio of their areas.
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Answer:
1:9
Step-by-step explanation:
ratio of radius of smaller circle to bigger circle=1:3
radius of smaller circle, r=x
radius of bigger circle, R=3x
area of smaller circle = πr^2 = πx^3
area of bigger circle= πR^2= π9x^3
ratio of their areas = πx^3 : π9x^3= 1:3
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