Jawabanmu

2014-02-22T14:44:22+07:00
Keliling = 2 π r
616 cm = 2 x 22/7 x r
r = (616 x 7) / (22 x 2)
r = 98 cm
2014-02-22T14:45:27+07:00
Kll = π x d
616 =  \frac{22}{7} x d
616 x  \frac{7}{22} = d
28 x 7 = d
196 =d      => r = 98