Jawabanmu

2014-03-17T18:14:24+07:00
ΡAlkohol / ρAir = Falkohol / Fair
ρ Alkohol = Falkohol × ρAir / Fair
ρ Alkohol = 16 × 1000 / 20 = 800 Kg/m³
2014-03-17T18:19:33+07:00
Caranya pakek rumus
F=p.g.v
jadi, p=F/g.v