Question 1:
For this case we have that by definition, the area of a circle is given by:
Where:
r: It is the radius of the circle.
They tell us that the diameter is 9 inches, then the radius is 4.5 inches. substituting we have:
Thus, the area of the circle is
ANswer:
Option C
QUestion 2:
For this case we have that by definition, the volume of a cylinder is given by:
Where:
r: It's the radio
h: It's the height
According to the data we have to:
Substituting in the formula:
Finally, the volume of the cylinder is
Answer:
Option C
Question 3:
For this case we have that by definition, the volume of a cylinder is given by:
Where:
r: It's the radio
h: It's the height
According to the data we have to:
Substituting in the formula:
Finally, the volume of the cylinder is
Answer:
Option B
Question 4:
For this case we have that the volume of the bricks comes given by:
The volume of each brick is
On the other hand, we have that the volume of the crate is also obtained by multiplying its three dimensions, that is:
Thus, the volume of the crate is
We divide the volume of the crate between the volume of the brick to know the quantity:
Thus, 80 bricks fit.
Answer:
Option A