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The area of a circle is 1386 cm2. What is its circumference?

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The area of a circle is 1386 cm2. What is its circumference?
posted Sep 16 by Balwinder
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1 Answer

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πr^2 = 1386 cm^2
r^2 = 1386/π = 441.1775 cm^2
r = 21 cm
Circumference = 2πr = 132 cm.

answer Sep 16 by Tejas Naik

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