Jawabanmu

2014-03-20T18:25:55+07:00
Vbf = Vb -  \frac{1}{4} Vb
Vbf =  \frac{3}{4} Vb

untuk benda terapung berlaku
w = Fa
(ρb)(Vb)(g) = (pf)(Vbf)(g)
(ρb)(Vb) = (pf)( \frac{3}{4} Vb)
ρb =  \frac{3}{4} ρf
ρb = 0,75 g/cm³

CMIIW :3