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If the circle below has center \(O\) and the length of the arc \(RST\) is \(18 \pi,\) what is the perimeter of the regio

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If the circle below has center \(O\) and the length of the arc \(RST\) is \(18 \pi,\) what is the perimeter of the regio

by Vincen » Wed Oct 06, 2021 5:36 am

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If the circle below has center \(O\) and the length of the arc \(RST\) is \(18 \pi,\) what is the perimeter of the region \(RSTU?\)

(A) \(12 \pi+ 18\)
(B) \(12 \pi+ 27\)
(C) \(18 \pi+ 27\)
(D) \(18 \pi+ 54\)
(E) \(18 \pi+ 108\)

Answer: D

Source: Manhattan GMAT
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