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rusku = 2 m
m = 160 ton = 160.000 kg
dit : ρ ?
dijawab
V = rusuk³
= 2³
= 8 cm³
jadi massa jenis :
ρ = m/V
= 160.000/8
= 20.000 g/cm³
= 2 x10⁴ g/cm³