A.14
B.7
C.\(\dfrac{1}{7}\)
D.\(\dfrac{7}{2}\)

A.\(\dfrac{{{a^3}\sqrt 3 }}{2}\)
B.\({a^3}\sqrt 6 \)
C.\(2\sqrt 3 {a^3}\)
D.\(\dfrac{{{a^3}\sqrt 3 }}{3}\)

A.4
B.5
C.6
D.3

A.\(\dfrac{1}{5}\)
B.\(\dfrac{1}{4}\)
C.\(\dfrac{1}{6}\)
D.\(\dfrac{1}{8}\)

A.33
B.27
C.31
D.29

A.\(\dfrac{{7234}}{{7429}}\)
B.\(\dfrac{{7012}}{{7429}}\)
C.\(\dfrac{{7123}}{{7429}}\)
D.\(\dfrac{{7345}}{{7429}}\)

A.\(\dfrac{x}{2} = \dfrac{{y - 3}}{{ - 1}} = \dfrac{{z + 1}}{{ - 3}}\)              
B.\(\dfrac{{x - 1}}{{ - 2}} = \dfrac{{y - 2}}{1} = \dfrac{z}{3}\)
C.\(\dfrac{{x - 4}}{{ - 2}} = \dfrac{y}{{ - 1}} = \dfrac{{z - 2}}{3}\)            
D.\(\dfrac{{x - 2}}{{ - 2}} = \dfrac{{y - 1}}{1} = \dfrac{{z - 1}}{3}\)

A.\(2 + \sqrt 2 \)
B.\(3 + \sqrt 2 \)
C.\(2 - \sqrt 2 \)
D.\(3 - \sqrt 2 \)

A.\(d = \dfrac{{a\sqrt {1513} }}{{89}}\)
B.\(d = \dfrac{{a\sqrt {1315} }}{{89}}\)
C.\(d = \dfrac{{2a\sqrt {1513} }}{{89}}\)
D.\(d = \dfrac{{2a\sqrt {1315} }}{{89}}\)

A.\(V = \dfrac{{5\sqrt {15} \pi }}{{18}}\)
B.\(V = \dfrac{{5\pi }}{3}\)
C.\(V = \dfrac{{5\sqrt {15} \pi }}{{54}}\)
D.\(V = \dfrac{{4\sqrt 3 \pi }}{{27}}\)