Find, in terms of π, the length of the arc that subtends an angle of 30° at the centre of a circle of radius 4 cm.

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Solution

The arc length l of a sector of an angle θ in a circle of radius r is given by

It is given that and. Substituting the value of r and θ in above equation,

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Find, in terms of the $π$ , the length of the arc that subtends an angle of $30^{\circ}$ at the centre of a circle of radius 4 cm.

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