Answer:
1,005 cm³
Explanation:
Since the tube is in a cylindrical shape, we should use the equation for finding the volume of a cylinder: V = πr²h. r is the radius of the cylinder, and h is the height.
We are given that the diameter is 8 cm, so we should divide that number in half in order to get a radius of 4 cm. Plug that value along with a height of 20 cm into the equation to solve for the volume.
- V = πr²h
- V = π(4 cm)²(20 cm)
- V = 1005.3 cm³
The approximate volume of a cylindrical cardboard tube with a diameter of 8 cm and a height of 20 cm is 1,005 cm³.