Answer:
The volume of the cylinder is 647.07 cm cubed.
Explanation:
Volume of a cylinder = base * height
Base =

Height =

We know the diameter of each ball is 6.5 cm, so the diameter of the cylinder is equal to that: 6.5 cm.
The radius is half the diameter, so 6.5 / 2 = 3.25 cm
Now we find the area of the base:

Now we calculate the volume of the cylinder

The volume of the cylinder is therefore, 647.07 cm cubed.
Hope this helps :)