Answer:
Step-by-step explanation:
:P nice points ty :)
find the length of the long diagonal across the tank.
first find the 2D diagonal , then use that dist. to find the long 3D diagonal
[tex]C^{2}[/tex] = [tex]3^{2}[/tex]+[tex]4^{2}[/tex]
C = 5 (2D)
now find the 3D
[tex]C^{2}[/tex] = [tex]5^{2}[/tex]+[tex]12^{2}[/tex]
C = 13 inches
( they made it easy ) :)