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p = 6 cm
l = 40 cm
t = 3 cm
m = 648 gram
dit : ρ ?
dijawab :
V = p x l x t
= 6 x 40 x 3
= 720 cm³
jadi massa jenis :
ρ = m/V
= 648 / 720
= 0,9 g/cm³
v = p. l.t
v = 6 cm x 40 cm x 3 cm
v = 720 cm³
langkah 2 : cari massa jenisnya
massa jenis = massa / volume
= 648 gram / 720 cm³
= 0,9 gram / cm³
= 900 kg/ m³