We need first to find the volume in cm^3
[tex]V=l\times w\times h[/tex]Where l is the length, w is the width and h is the height
We have the next information
l=50 cm
h=12 cm
w=20 cm
we substitute the values
[tex]V=50\times20\times12=12000\text{ cm}^3[/tex]Then we need to convert cm^3 to liters
1L =1000cm^3
[tex]\frac{12000}{1000}=12L[/tex]The volume of the fish tank in Liters is 12L
