Jawabanmu

2014-06-10T20:30:38+07:00
Keliling = π x d =440 , d = 140, r = 70
2014-06-10T20:33:28+07:00
Jari-jari = (440 x 7) / (22 x 2)
jari jari = 3080/44
jari jari = 70 cm
{ maaf kalau salah :) }