The circumference of a circle exceeds the diameter by 18cm . find the radius of the circle.
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let the radius be x
diameter - 2x
circumference=2x+18
2×22/7×x=2x+18
44/7x=2x+18
44/7x-2x=18
44x-14x/7=18
30x/7=18
x=18×7/30
=21/5
=4.2cm
diameter - 2x
circumference=2x+18
2×22/7×x=2x+18
44/7x=2x+18
44/7x-2x=18
44x-14x/7=18
30x/7=18
x=18×7/30
=21/5
=4.2cm
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