Jawabanmu

2014-04-09T11:35:53+07:00
12 x 45 = 540
13 x 47 = 611
611 - 540 = 71
71/2 = 35,5 kg 
maaf kalau salah :)
2014-04-09T12:46:34+07:00
Jika 12 anak = 12 x 45 = 540
jika 13 anak = 13 x 47 = 611
berat aura = 611 - 540/2 = 71/2 = 35,5 kg