genyjoannerubiera
15.04.2021 •
Mathematics
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Solved
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Ответ:
Ответ:
A = (pi)r^2
The sum of the areas of two circles is 80 square meters.
A1 + A2 = 80
(pi)r1^2 + (pi)r2^2 = 80
where r1 = 2r2
(pi)2r2^2 + (pi)r2^2 = 80
r2 = 2.91
r1 = 5.83