ConceptProblems Based on Areas and Perimeter Or Circumference of Circle, Sector and Segment of a Circle

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#### Question

An elastic belt is placed round the rim of a pulley of radius 5 cm. One point on the belt is pulled directly away from the centre O of the pulley until it is at P, 10 cm from O. Find the length

of the belt that is in contact with the rim of the pulley. Also, find the shaded area.

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