Question 1:
For this case we have that by definition, the volume of a prism is given by:

Where:
a: It is the long
b: It is the width
c: It is the height
According to the data we have:

Substituting:

Thus, the volume of the building is
Answer:
Option B
Question 2:
For this case we have that by definition, the volume of a prism is given by:

Where:
a: It's the long
b: It is the width
c: It is the height
According to the data we have:

Substituting:

Thus, the volume of the tank is 
Answer:
Option A
Question 3:
For this case we have that by definition, the volume of a cube is given by:

Where:
l: It's the side of the cube
According to the data we have that the cube side is 7.2ft.
Substituting we have:

Rounding off we have that the volume of the cube is 
Answer:
Option B
Question 4:
For this case we have that by definition, the volume of a cube is given by the following formula:

Where:
l: It's the side of the cube
According to the data we have that the cube side is 4.5 yards.
Substituting we have:

Rounding off we have the cube volume is
Answer:
Option C