Answer:
1005 cm³ will be the volume of the cylinder cardboard tube.
Explanation:
Diameter of a cylinder cardboard tube = 8 cm
Therefore radius = 4 cm.
Height of the cylinder cardboard tube = 20 cm.
Now we have to calculate the volume of the tube
As we know the formula of the volume of cylinder is
V = πr²h
V = π (4)²(20) = 320π cm³
Now we put the value of π as 3.14
Volume = 3.14×320 = 1004.80 ≈ 1005 cm³
Therefore Volume of the cylinder cardboard used to package a gift will be = 1005 cm³