A.\(\dfrac{{{a^3}\sqrt 3 }}{6}\)
B.\(\dfrac{{{a^3}\sqrt 3 }}{4}\)
C.\(\dfrac{{{a^3}\sqrt 3 }}{{15}}\)
D.\(\dfrac{{{a^3}\sqrt 3 }}{{12}}\)

A.\(\dfrac{{\sqrt 2 }}{2}\)
B.\(\sqrt 5 \)
C.\(\dfrac{{\sqrt {17} }}{2}\)
D.\(\dfrac{1}{2}\)

A.\(S = 515\)
B.\(S = 164\)
C.\(S = 436\)
D.\(S =  - 9\)

A.\(3\)
B.\(2\)
C.\(1\)
D.\(4\)

A.\(\dfrac{a}{b} <  - 1\)
B.\(\dfrac{a}{b} > 1\)
C.\(a + b = 1010\)
D.\(b - a = 3029\)

A.worked
B.stopped
C.forced
D.wanted

A.higher
B.the higher
C.highest
D.the highest

A.above
B.with
C.to
D.of

A.was held
B.held
C.being held
D.will hold

A.weren't they
B.wasn't they
C.didn't they
D.don't they