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jmc

prealgebra intermediate

Problem

Circle has a diameter of 12 inches and circle has a diameter of 22 inches. What is the ratio of the area of circle to the area of circle ? Express your answer as a common fraction.
Solution
The ratio of the diameter of circle A to the diameter of circle B is . The ratio of the areas of the two circles is the square of this ratio: .
Final answer
\frac{36}{121}