If area of a circle is 38.5cm. Find the circumfrence.
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Answer:
Circumference is 22.Formula is 2√πA
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Given,
•area of circle =38.5 cm
Solution,
=area of circle = πr^2
38.5=22/7 * r^2
38.5*7/22 =r^2
12.25=r^2
Under root of 12.25 is 3.5
r=3.5
Circumference =2πr
=2*22/7*3.5
=44*0.5
=22
•area of circle =38.5 cm
Solution,
=area of circle = πr^2
38.5=22/7 * r^2
38.5*7/22 =r^2
12.25=r^2
Under root of 12.25 is 3.5
r=3.5
Circumference =2πr
=2*22/7*3.5
=44*0.5
=22
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