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Ex 12.1, 2 - Chapter 12 Class 10 Areas related to Circles (Term 1)
Last updated at May 29, 2018 by Teachoo
Area/Perimeter of Circle
Transcript
Ex 12.1, 2 The radii of two circles are 8 cm and 6 cm respectively. Find the radius of the circle having area equal to the sum of the areas of the two circles. Given that, Radius of 1st circle = r1 = 8 cm Radius of 2nd circle = r2 = 6 cm Let the radius of required circle = r cm According to question, Area of required circle = Sum of the area of both the circles Now, Area of required circle = Sum of the area of both the circles Area of required circle = Area of 1st circle + Area of 2nd circle Area of required circle = 64 π + 36 π πr2 = 100 π r2 = 100 r = β100 r = β(γ10γ^2 ) r = 10 cm Hence , radius of required circle = 10 cm
