Question 16 • Precalculus
In one revolution, the particle travels the circle’s circumference, 2πr inches. At 16 revolutions per minute, its linear velocity is 16(2πr) = 32πr inches per minute. Setting this equal to 240π gives r = 240π ÷ 32π = 7.5 inches, so the distance is 7.5 inches (choice B).
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