Mass of the lump of copper = 890 g
Density of copper = 8.9 g/cm3
So, the volume of the lump of copper = Mass / Density
= 890 g / 8.9 g/cm3
= 100 cm3
Thus, when the lump of copper is dipped into a glass filled to the brim with water, the volume of water that will overflow is 100 cm3.