Jawabanmu

2013-12-09T17:40:37+07:00
L= phi x r x r = 22/7 x 14= 44 :) 
maaf kakak jawaban nya itu gk ada di pilihan
2013-12-09T20:03:16+07:00
V=phi.r^2
2156=22/7.r^2
      r^2=2156:22/7
      r^2=2156:3,14286
      r^2=685,9
         r=26,18

LP=2.phi.r (r+t)
    =2.22/7.26,18( 26,18+14)
    =164,56 (40,18)
    =6612