Question

piece of wood of volume 2m^3 floats in water.the volume exposed is 0.4m^3.find the mass of water displaced by wood.calculate the ensity of wood.

Answer 1

Weight of the displaced liquid = $\rho ∆Vg$
$$\begin{gathered} W=mg=1000\times \left(2-0.4\right)g \\ m=1600kg \end{gathered}$$

By knowing mass of the wood , we can calculate its density.