# Thread: ratio of areas

1. ## ratio of areas

The ratio of the areas of two circles is 9:4. If the circumference of the smaller circle is , what is the perimeter of the larger circle?

(A)
(B)
(C)
(D)

Thanks

2. ## ratio of circles' areas

The ratio of the areas of two circles is 9:4

The circumference of the smaller circle is given by the formula

The circumference of the larger circle is given by the formula

Therefore the correct answer is (D).

3. Thank you!!

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