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AMC 12 2022b Problem 21

  • Paper

Let SS be the set of circles in the coordinate plane that are tangent to each of the three circles with equations x2+y2=4x^{2}+y^{2}=4, x2+y2=64x^{2}+y^{2}=64, and (x−5)2+y2=3(x-5)^{2}+y^{2}=3. What is the sum of the areas of all circles in SS?

(A) 48π(B) 68π(C) 96π(D) 102π(E) 136π\textbf{(A) } 48 \pi \textbf{(B) } 68 \pi \textbf{(C) } 96 \pi \textbf{(D) } 102 \pi \textbf{(E) } 136 \pi

Dataset text AMC 12 2000 to 2025. Quoted with source.

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E

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