Solve for r

r=\frac{\pi c}{2},c>\frac{10}{\pi }

$r=2πc ,c>π10 $

Solve for c

c=\frac{2r}{\pi },r>5

$c=π2r ,r>5$

Solve

c = 5, r = 6283185307/800000000

$c=5,r=6283185307/800000000$

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