Q: can you find the volume of the tank based on the opposite sides as the bases. 
This one was a tricky one lol. 
To find volume you need a formula: 
Formula for volume varies on the shape of the object.
Cube = a 3a is the side length
Rectangular prism = a * b * ca, b, c are the length, width, and height
Cylinder = π * r 2 * hr is the radius of the circular baseh is the height
for this one you would need the Rectangular prism formula. 
A: No you cannot find the volume because you need length, width, and height to figure out the volume of the rectangular prism. 
Hope this helped! :)