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The radius of circle A is r, and the radius of circle B is 3/4r. What is the ratio of the area of circle A to the area of circle B?

The radius of circle A is r, and the radius of circle B is 3/4r. What is the ratio of the area of circle A to the area of circle B? Correct Answer 16 to 9

area of circle A is = πr2area of circle B is = π(3r4)2 = 916πr2ratio of area of circle A to circle B = πr2916πr2                                                                  = πr2 ×169πr2                                                                  = 16/9 or  16 to 9 (Ans)

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