A.\(\dfrac{{{a^3}\sqrt 3 }}{{12}}\)
B.\(\dfrac{{{a^3}\sqrt 2 }}{{12}}\)
C.\(\dfrac{{{a^3}\sqrt 3 }}{6}\)
D.\(\dfrac{{{a^3}\sqrt 2 }}{6}\)

A.\(\dfrac{{\sqrt 2 \pi {a^3}}}{8}\)
B.\(\dfrac{{3\sqrt 2 \pi {a^3}}}{{16}}\)
C.\(\dfrac{{3\sqrt 3 \pi {a^3}}}{{16}}\)
D.\(\dfrac{{\sqrt 3 \pi {a^3}}}{8}\)

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

A.\(2{a^2}\pi \)
B.\(3{a^2}\pi \)
C.\(4{a^2}\pi \)
D.\({a^2}\pi \)

A.\(r = 3cm\,;\,\,V = 75,96c{m^3}\)
B.\(r = 4cm\,;\,\,V = 401,92c{m^3}\)
C.\(r = 4cm\,;\,\,V = 100,48c{m^3}\)
D.\(r = 3cm\,;\,\,V = 169,56c{m^3}\)

A.\(r = 0,8cm\,\,;\,\,\,h = 2,2cm\)
B.\(r = 0,9cm\,\,;\,\,\,h = 2cm\)
C.\(r = 0,8cm\,\,;\,\,\,h = 2cm\)
D.\(r = 0,9cm\,\,;\,\,\,h = 2,2cm\)

A.\(10cm\)
B.\(9cm\)
C.\(12cm\)
D.\(8cm\)

A.\(129,32\pi \,\,\left( {c{m^3}} \right)\)
B.\(517,54\pi \,\,\left( {c{m^3}} \right)\)
C.\(129,32\,\,\left( {c{m^3}} \right)\)
D.\(517,54\,\,\left( {c{m^3}} \right)\)

A.\(\dfrac{{\pi {a^3}}}{2}\,\,\left( {c{m^3}} \right)\)
B.\(\pi {a^3}\,\,\left( {c{m^3}} \right)\)
C.\(\dfrac{{\pi {a^3}}}{3}\,\,\left( {c{m^3}} \right)\)
D.\(2\pi {a^3}\,\,\left( {c{m^3}} \right)\)

A.\(a = R\sqrt {\dfrac{5}{2}} \)
B.\(a = \dfrac{{R\sqrt 5 }}{2}\)
C.\(a = \dfrac{{R\sqrt 3 }}{2}\)
D.\(a = R\sqrt {\dfrac{3}{2}} \)