Question

the area of circle is 1386 square cm find its circumference​

Answer 1

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Answer 2

area of circle is πr²

(22/7)x² is 1386 cm²

x² is 1386*(7/22)

x² is 441

x is √441 is 21.

so we get radius 21.

circumference is 2πr

2*(22/7)*21 is 132cm