2023 AMC 10A Problem 15


An even number of circles are nested, starting with a radius of 11 and increasing by 11 each time, all sharing a common point. The region between every other circle is shaded, starting with the region inside the circle of radius 22 but outside the circle of radius 1.1. An example showing 88 circles is displayed below. What is the least number of circles needed to make the total shaded area at least 2023π2023\pi?


(A) 46(B) 48(C) 56(D) 60(E) 64\textbf{(A) } 46 \qquad \textbf{(B) } 48 \qquad \textbf{(C) } 56 \qquad \textbf{(D) } 60 \qquad \textbf{(E) } 64

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Category: AMC 10A
Points: 3
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