Question 1 - Area and Circumference of Circle - Chapter 11 Class 10 Areas related to Circles
Last updated at Dec. 13, 2024 by Teachoo
Last updated at Dec. 13, 2024 by Teachoo
Question 1 The radii of two circles are 19 cm and 9 cm respectively. Find the radius of the circle which has circumference equal to the sum of the circumferences of the two circles. Given that, Radius of 1st circle = r1 = 9 cm Radius of 2nd circle = r2 = 19 cm Let the radius of required circle = r cm According to question, Circumference of required circle = Sum of circumference of two circles Now, Circumference of required circle = Sum of circumference of two circles 2𝜋r = 18𝜋+38𝜋 2𝜋r = 56 𝜋 r = 56𝜋/2𝜋 r = 28 Hence, radius of new circle = r = 28 cm
Area and Circumference of Circle
About the Author
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 and Computer Science at Teachoo