circumference of a circle exceeds its diameter by 18 cm find the radius of the circle.
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2πr=2r+18
2×22/7×r= 2r+18
=44r=14r+126
=44r-14r=126
30r=126r=4.2
2×22/7×r= 2r+18
=44r=14r+126
=44r-14r=126
30r=126r=4.2
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