Jawabanmu

2014-02-24T22:10:57+07:00
Pertama cari massa jenis benda. Vf = 2/3
vb ρb/ ρf =
vf/vb
ρb/1 =
2/3vb / vb ρb =
2/3 x 1 ρb = 2/3 = 0,66
 lalu, vf = xvb
ρb/ ρf = vf/vb
0,66/0,8 = xvb /vb
X = 0,66/0,8   
= 0,83 bagian
   



terima kasih banyak :)
sama sama banyak:D