(3.14r+r)×2=16.56(3.14r+r)×2=16.
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(3.14r+r)×2=16.56(3.14r+r)×2=16.
(3.14r+r)×2=16.56
(3.14r+r)×2=16.
(3.14r+r)×2=16.56(3.14r+r)×2=16.
(3.14r+r)×2=16.56
4.14r×2=16.56
r=16.56÷4.14÷2
r=2
3.14r+r)×2=16.56;
4.14r=8.28;
r=2;
(3.14r+r)×2=16.56
4.14r*2=16.56
4.14r=8.28
r=2
(3.14r+r)×2=16.56
4.14r=8.28
r=2