Jawabanmu

2014-03-10T14:39:14+07:00
Kll=phi . d 154= 22/7 . d d = 154 : 22/7 d = 49
2014-03-10T14:40:03+07:00
Kel ling= π. D
154= 22/7. D
D=154.7/22
D=49