If the pendulum swings through an angle of 30 degrees and describes an arc length of 11 cm then the length of the pendulum is
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angle=30°, length of arc(L)=11 cm
Length of Pendulum=Radius of circle
angle=30°×π÷180°
=π÷60 radians
Length of Pendulum(r)=L÷angle
=11×60÷π
=660×7÷22
=210 cm
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