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panjang = 300 cm
tinggi = 200 cm
lebar = 50 cm
m = 750 kg
dit : ρ ?
djawab :
v = p x l x t
= 300 x 200 x 50
= 3.000.000 cm³
= 3 m³
ρ = m/v
= 750/3
= 250 kg/m³