Which best describes the relationship among the volumes of hemisphere X, cylinder Y, and cone Z?

A. The sum of the volumes of X and Y equals the volume of Z.

B. The sum of the volume of X and Z equals the volume of Y.

C. The difference of the volumes of Z and Y equals the volume of X.

D. The difference of the volumes of X and Z equals the volume of Y.

B. The sum of the volume of X and Z equals the volume of Y.

Step-by-step explanation:

To solve the problem, we calculate the volume of the three solids, and then we compare them.

The volume of X is the volume of a hemisphere of radius r, which is half the volume of a sphere of radius r, so:

The volume of Y is the volume of a cylinder of radius r and height

h = r

so it is given by the formula:

Finally, the volume of Z is the volume of a cone of radius r and height

h = r

So the volume is given by

So we see that the correct option is

B. The sum of the volume of X and Z equals the volume of Y.

In fact:

99

step-by-step explanation: