A pendulum swings through an angle of
42° in describing an arc of length 55 cm.
The length of the pendulum is;
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Answer:
radius=arc length/angle
Explanation:
42° in radian measure=(π/180)42=21π/90
r=55/(21π/90)
=11/(21π/18)
=11/(22/7/18)
=11/(11/7/9)
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