Question 2 In a circle of diameter 42cm ,if an arc subtends an angle of 60° at the centre where 𝜋 = 22/7,then the length of the arc is (a) 22/7 cm (b) 11 cm (c) 22 cm (d) 44 cm
Diameter = 42 cm
∴ Radius = 21 cm
Length of Arc = 𝜽/𝟑𝟔𝟎× 𝟐𝝅𝒓
= (60°)/(360°) × 2 ×22/7 × 21
= 1/6 × 2 × 22/7 × 21
= 22 cm
So, the correct answer is (c)
Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.
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