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

 

This question is inspired from Question 14 - CBSE Class 10 Sample Paper for 2021 Boards - Maths Standard

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  1. Class 10
  2. Solutions of Sample Papers for Class 10 Boards

Transcript

Question 2 In a circle of diameter 42cm ,if an arc subtends an angle of 60ยฐ at the centre where ๐œ‹ = 22/7,then the length of the arc is (a) 22/7 cm (b) 11 cm (c) 22 cm (d) 44 cm Given Diameter = 42 cm โˆด Radius = 21 cm Length of Arc = ๐œฝ/๐Ÿ‘๐Ÿ”๐ŸŽร— ๐Ÿ๐…๐’“ = (60ยฐ)/(360ยฐ) ร— 2 ร—22/7 ร— 21 = 1/6 ร— 2 ร— 22/7 ร— 21 = 22 cm So, the correct answer is (c)

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.