The region consisting of all points in three-dimensional space within 3 units of line segment \overline{A B} has volume 216 \pi. What is the length A B ?
Answer Choices
A. 6
B. 12
C. 18
D. 20
E. 24
The region consisting of all points in three-dimensional space within 3 units of line segment \overline{A B} has volume 216 \pi. What is the length A B ?
Answer Choices
A. 6
B. 12
C. 18
D. 20
E. 24