find the circumference of a circle whose area is 6.16cm^2
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Answer:
area of circle=πr^2
6.16cm^2=22/7×r^2
6.16×7/22=r^2
43.12/22=r^2
1.96=r^2
√1.96=r
1.4cm=r
circumference of circle=2πr
=2×22/7×1.4
=44×0.2
=8.8cm
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