Recall that the volume of a cylinder is given by
Where r is the radius and h is the height of the cylinder.
Also, we know that the radius is half of the diameter.
In the given figure,
Diameter is given that is 8 cm and the height is 2 cm
So, the radius of the cylinder would be 8/2 = 4 cm
Since the cylinder is half cut, the volume of the cylinder will be half (divide by 2)