The numerical difference between circumference and diameter is 30 cm. What is the radius of the circle? TAKE ? = 22/7

Asked by abhishek agrawal | 11th Feb, 2014, 11:15: PM

Expert Answer:

Let the radius of the circle be r cm.
 
Now, circumference - diamater = 30 cm
i.e. 2open parentheses 22 over 7 close parentheses r - 2r = 30
i.e. 2r open parentheses 22 over 7 minus 1 close parentheses = 30
i.e. r open parentheses 22 over 7 minus 1 close parentheses = 15
i.e.r open parentheses fraction numerator 22 minus 7 over denominator 7 end fraction close parentheses equals 15
i.e. 15 r = 15 x 7
i.e. r = 7 cm

Answered by  | 12th Feb, 2014, 10:04: AM

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