An inverted cone with base radius 12 \mathrm{~cm} and height 18 \mathrm{~cm} is full of water. The water is poured into a tall cylinder whose horizontal base has a radius of 24 \mathrm{~cm}. What is the height in centimeters of the water in the cylinder?
Answer Choices
A. 1.5
B. 3
C. 4
D. 4.5
E. 6