The area of circle is 616cm . Find its radius and circumference
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Area of a circle = πr^2
616 = 22/7 × r^2
616×7/22 = r^2
56×7/2 = r^2
28×7 = r^2
r = √196
r = 14
Circumference of a circle = 2πr
= 2×22/7×14
= 2×22×2
Circumference of a circle = 88
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