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a.b. Aluminium berat = 810 gr, m.j = 2,7 gr/cm³ ⇒ Volume = 810/2,7 =300 cm³
a.c kayu Volume = 200 cm³ m.j 0,65 gr/cm³ = berat = 200 x 0,65 = 130 gram
b. Volume = 5 x 4 x 3 =60 cm³ massa = 240 gram ⇒ massa jenis =240/60 = 4 gr/cm³
c massa = 200 gr , volume = 50 cm³ ⇒ m.j = 200/50 = 4 gr/cm³