Jawabanmu

2014-06-02T08:53:44+07:00
Pake konsep hukum archimedes, 
Wb = Fa
mb. g = Rho_air. g. Vcelup
Rho_benda. Vtot = Rho_air. (1/2 . Vtot)
Rho_benda = 0,5 g/cm^3