The circumference is 62.8 mm. Find the area of a circle whose radius is 2 times the radius of the given circle.
| December 7, 2020 | education
We know that the circumference L = 2 * pi * R, whence R = L / 2pi = 10mm is the radius of the given circle.
Second circle radius: R = 2R = 20mm. The area of such a circle is S = pi * r ^ 2 = 1256 mm ^ 2.
Answer: 1256 mm ^ 2.
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