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?

Question

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?

koikkara · Answer

Hmm.. Since, both lead and aluminium are more dense than water the cubes will sink and raise the water level by the volume of each cube. 
let's say, 
cube measures $2.0  ~ cm$ on each side then, the volume of the cube should be $2^3 = 8 $, (i.e) the volume displaced.

What was the original volume ? _____ mL $+$ Vol of cube (displaced) ______ $=~??$ 
Hope you got, $48g/cm^3$ is just the volume, to know in $mL$,  use the answer $48.0 mL$

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