Brian likes to grow cactus plants in his kitchen window. He has read that around 90 percent of a cactus’s volume is used for water storage. He wondered which of two types of cacti in the window could hold the most water, so he decided to estimate their volumes to make a comparison. Brian’s measurements are shown in the diagram below.

Assume that the shapes fill the given dimensions. Don’t take into account gaps or spines on the surface when determining the volume. Calculate the approximate volume of each cactus using 3.14 for π (pi).


Which statement best compares the volumes of the cacti?

A. The barrel cactus has a volume of 268 cm3. The column cactus has the greater volume at 1,065 cm3.

B. The column cactus has a volume of 205 cm3. The volume of the barrel cactus is just slightly less at 201 cm3.

C. The column cactus has a volume of 242 cm3. The barrel cactus has the greater volume at 268 cm3.

D. The barrel cactus has the greater volume at 2,144 cm3. The column cactus has a volume of 1,065 cm3.

Please explain how you got the answer and draw it if you can!