The area of a circle is 38.5. find it's diameter
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area of circle=2πr
38.5=2*22/7*r
38.5=44/7*r
r=44/7-38.5
r=44-269.5/7
r=225.5/7
r=32.2
therefore diameter will be 32.2*2 as daimeter is radius *2=64.4 ans.
hope it helps
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