Taking my first ever chemistry class and i've run into this problem:

Suppose you have two 100-mL graduated cylinders. In each cylinder there is 40.0 mL of water. You also have two cubes: one is lead and the other is aluminum. Each cube measures 2.0 cm on each side. After you carefully lower each cube into the water of its own cylinder, what will the new water level be in each of the cylinders?

we are given the following data: aluminum density = 2.70 g/cm(cubed), lead density = 11.3 g/cm(cubed)

I am really new to things like unit conversions and there are no sample problems of this type in the book...it goes from "heres how to calculate density" to this problem... i wish the book would show the answers so i could at least reverse engineer the problem and check my work... if someone could show me how to do this i would really appreciate it, thanks!