Question

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Answer 1

Hope it will help you. . . . . . . . . . .

Answer 2

the area of circle = πr^2

therefore,

πr^2=314

3.14r^2=314

r^2=314/3.14=100

r=√100=10

radius of circle is 10

so, circumference of circle = 2πr

2*3.14*10=62.8

hence the answer is 62.8