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A 1.5 cm minute hand turns for 20 minutes. How far does its tip move (π = 3.14)?
A3.14 cm
B6.28 cm
C1.57 cm
D9.42 cm
Answer & Solution
Correct answer: A. 3.14 cm
20 minutes is a third of a turn, 2π/3 radians, so l = 1.5 x 2π/3 = π = 3.14 cm.
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