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ICSE Class 8 Answered

 if the difference between the circumference and diameter of a circle is 30 cm then what is the radius of the circle
Asked by kumarniku99316385 | 21 Dec, 2018, 05:13: PM
answered-by-expert Expert Answer
begin mathsize 16px style 2 πr space space minus space 2 straight r space equals space 30 rightwards double arrow 2 straight r left parenthesis straight pi space minus space 1 right parenthesis space equals space 30 rightwards double arrow straight r space equals fraction numerator 15 over denominator straight pi space minus space 1 end fraction space equals space fraction numerator 15 over denominator begin display style 22 over 7 end style space minus space 1 end fraction space equals space fraction numerator 15 over denominator begin display style 15 over 7 end style end fraction space equals space 7 space cm end style
Answered by Yasmeen Khan | 21 Dec, 2018, 07:02: PM

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