7. The three-view drawing of a certain solid is shown in the figure. The volume of this solid is A. $24 \pi - 6$ B. $8 \pi - 6$ C. $24 \pi + 6$ D. $8 \pi + 6$
Given non-zero vectors $\boldsymbol { a } , \boldsymbol { b }$ satisfying $| \boldsymbol { a } | = 2 | \boldsymbol { b } |$, and $( \boldsymbol { a } - \boldsymbol { b } ) \perp$
7. The three-view drawing of a certain solid is shown in the figure. The volume of this solid is\\
A. $24 \pi - 6$\\
B. $8 \pi - 6$\\
C. $24 \pi + 6$\\
D. $8 \pi + 6$\\