...

If area of quadrant of a circle is 38.5 cm 2 then find its diameter

(use 𝜋 = 22/7)

Question 17 - CBSE Class 10 Sample Paper for 2020 Boards - Maths Basic

Question 17 - CBSE Class 10 Sample Paper for 2020 Boards - Maths Basic - Part 2

Go Ad-free

Transcript

Question 17 If area of quadrant of a circle is 38.5 cm2 then find its diameter (use 𝜋 = 22/7) We know that Area of quadrant = 1/4× Area of circle Area of quadrant = 1/4 × πr2 Putting values 38.5 = 1/4 × 22/7 × r2 385/10 = 1/4 × 22/7 × r2 385/10 × 4/1 × 7/22 = r2 35/10 × 4/1 × 7/2 = r2 35/10 × 2 × 7 = r2 490/10 = r2 49 = r2 r2 = 49 r = √49 r = 7 So, Radius = r = 7cm Diameter = 2r = 2 × 7 = 14 cm

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.