What is the density of the rock
the scale reads 3 so it is displacing 5 kg of water find volume of rock using volume of water it displaces: volume of rock = 5 kg(m^3 / 1000 kg) = .005 m^3 mass of rock = 8 kg density = 8 / 0.005 (kg/m^3) 1600 Kg/ m^3
You would have to find the mass and volume of the rock and then do mass divided by volume to get your density
