A cube-shaped fish aquarium has a lid with an internal edge of cm. If the aquarium is made of glass having a thickness of cm, determine the volume of the glass.
Step 1: Find the internal volume of the aquarium.
Step 2: Find the external edge length of the aquarium. Add the internal length to the length of the glass on each side.
Step 3: Find the external volume of the aquarium.
Step 4: Determine the volume of the glass by finding the difference between the external volume of the aquarium and the internal volume.