Jawabanmu

2014-02-16T21:53:34+07:00
352 = 22/7 x d
d = 352 x 7/22
d = 112

L = phi r^2
      22/7 x 56 x 56
       9856
1 5 1
2014-02-16T22:03:52+07:00
K= phi . d 352= 22/7 .d d= 22/7 : 352 = 7/22 . 352 = 112 r = 112 : 2 = 56 L = phi . r^2 = 22/7 . 56^2 = 22/7 . 3136 = 9856