For this case, we can model the problem as a cylinder.
The volume of a cylinder by definition is given by:
V = (pi) * (r ^ 2) * (h)
Where,
r: cylinder radius
h: height
Substituting values:
V = (3.14) * ((2/2) ^ 2) * (7.5)
V = 23.55 in ^ 3
Answer:
the volume of the stack is:
B) 23.55 in3