An ice cube containing a piece of lead floats in water. What would be the effect on the level of water if the ice cube melts?

Let M and m represent the masses of ice and lead respectively.Now, (M+m)g = Vρwg∴  V = M+mρwAfter melting of ice, volume of water and lead,  V' = Mρw+mρ1Since ρ1 > ρw,   ∴  v'