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A 60 degree central angle cuts off an arc of 22 cm. Find the radius (π = 22/7).
A7 cm
B14 cm
C21 cm
D28 cm
Answer & Solution
Correct answer: C. 21 cm
r = l/θ = 22 / (π/3) = 22 x 3 x 7 / 22 = 21 cm.
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