Jawabanmu

2014-02-09T16:36:03+07:00
K=πr` =3.14.r' 113.04=3,14.r' r'=113.04/3.14
1 2 1
2014-02-09T17:08:51+07:00
R² = L / π
   =113.04 / 3.14
   =36
r = √36
  =6