Answer:
[tex]0.328\ l[/tex]
Step-by-step explanation:
Remember that
[tex]1\ l=1,000\ cm^{3}[/tex]
step 1
Find the volume of the aquarium
The volume is equal to
[tex]V=b^{3}[/tex]
we have
[tex]b=12\ cm[/tex]
substitute
[tex]V=(12)^{3}=1,728\ cm^{3}[/tex]
step 2
Convert to liters
[tex]1,728\ cm^{3}=1,728/1,000=1.728\ l[/tex]
step 3
Calculate how much more water is needed to fill the aquarium completely
Find the difference between the volume of the aquarium and the water that contains the aquarium
[tex]1.728\ l-1.40\ l=0.328\ l[/tex]