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V = 1,2 m³
W = 470,4 N
g = 9,8 m/s²
dit : ρ ?
dijawab :
W = m x g
470,4 = m x 9,8
m = 470,4/9,8
m = 48 kg
jadi :
p = m/V
= 48/1,2
= 40 kg/m³