Jawabanmu

2014-03-23T22:00:27+07:00
F = ρ g V
m x g = ρ g A L (lebar)
m = ρ 4πr^3
0,5 = ρ 4 (3,14) (0,1)^3
0,5 = ρ 12,56 x 10^-3
ρ = 500 / 12,56
ρ = 39,8 m^3/kg

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