The volume of a cube-shaped metal tank is 8m3. What is the length of the rib of this tank.

Since the metal tank has the shape of a cube, for a logical and more detailed explanation, you first need to write down the formula by which you can determine the volume of the cube.
In numerical form, it looks like this.
V = a3 [in the third degree].
or it can be written like this.
V = a * a * a.
Where V is the volume.
a is the length of the edge of the cube.
We express the side of the rib as follows.
a = V1 / 3 [to the 1/3 power].
Substitute the volume value in the formula and get.
a = 8 1/3.
a = 2 meters.

Answer.
The rib length of the metal tank is 2 meters.