The circumference of a circle exceeds the diameter by 30cm . Find the radius of the circle
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2*22/7*r=2r+30
2*22/7*r-2r=30
44r/7-2r=30
30r/7=30
r=7
2*22/7*r-2r=30
44r/7-2r=30
30r/7=30
r=7
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