Question

If the area of a circle is 308 cm2 ,then it's perimeter is

Answer 1

Answer:

area of circle= 308

$\pi \times r {}^{2} = 308 \\ r { }^{2} = 308 \div \pi \\ r = \sqrt{14 \times 7 } \\r = 7 \sqrt{2}$

perimeter=

$2\pi \times r$

2×22/7 ×7underroot2

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