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In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. Find: (i) the length of the arc .Q.5(1)

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Find the solution of the question 5(1) of exercise 12.2 of chapter areas related to circle ncert class 10 . Give me the easiest and simplest way to solve this question . Also find the best way to solve this question. In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. Find: (i) the length of the arc

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  1. ution:

    Ncert solution class 10 chapter 12-3

    Given,

    Radius = 21 cm

    θ = 60°

    (i) Length of an arc = θ/360°×Circumference(2πr)

    ∴ Length of an arc AB = (60°/360°)×2×(22/7)×21

    = (1/6)×2×(22/7)×21

    Or Arc AB Length = 22cm

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