A. \(S = 4\left( {2400 + \pi } \right)\)
B. \(S = 2400\left( {4 + \pi } \right)\)
C. \(S = 2400\left( {4 + 3\pi } \right)\)
D. \(S = 4\left( {2400 + 3\pi } \right)\)
A. \(4{V_1} = 9{V_2}\)
B. \(9{V_1} = 4{V_2}\)
C. \({V_1} = 3{V_2}\)
D. \(2{V_1} = 3{V_2}\)
A. \(\frac{1}{{18\sqrt 3 }}\sqrt {{{\left( {4{a^2} + 3{b^2}} \right)}^3}} .\)
B. \(\frac{\pi }{{18\sqrt 3 }}\sqrt {{{\left( {4{a^2} + 3{b^2}} \right)}^3}} .\)
C. \(\frac{\pi }{{18\sqrt 3 }}\sqrt {{{\left( {4{a^2} + {b^2}} \right)}^3}} .\)
D. \(\frac{\pi }{{18\sqrt 2 }}\sqrt {{{\left( {4{a^2} + 3{b^2}} \right)}^3}} .\)
A. \(V = 3\,\left( {{\rm{c}}{{\rm{m}}^3}} \right).\)
B. \(V = 4\,\left( {{\rm{c}}{{\rm{m}}^3}} \right).\)
C. \(V = 6\,\left( {{\rm{c}}{{\rm{m}}^3}} \right).\)
D. \(V = 7\,\left( {{\rm{c}}{{\rm{m}}^3}} \right).\)
A. \(S = 500\,\left( {{\rm{c}}{{\rm{m}}^2}} \right).\)
B. \(S = 400\,\left( {{\rm{c}}{{\rm{m}}^2}} \right).\)
C. \(S = 300\,\left( {{\rm{c}}{{\rm{m}}^2}} \right).\)
D. \(S = 406\,\left( {{\rm{c}}{{\rm{m}}^2}} \right).\)
A. \(3\)
B. \(\sqrt 2 \)
C. \(2\)
D. \(\sqrt 3 \)
A. \(V = \frac{{4\pi {a^3}}}{3}\)
B. \(V = \frac{{5\pi {a^3}}}{3}\)
C. \(V = \pi {a^3}\)
D. \(\frac{{7\pi {a^3}}}{3}\)
A. A, C, I thẳng hàng
B. B, C, I thẳng hàng
C. N, G, H thẳng hàng
D. B, G, H thẳng hàng
A. \(S = \frac{1}{2}\pi {a^2}.\)
B. \(S = 4\pi {a^2}.\)
C. \(S = 2\pi {a^2}.\)
D. \(S = \pi {a^2}.\)
A. \(15\pi cm^3\)
B. \(12\pi cm^3\)
C. \(36\pi cm^3\)
D. \(45\pi cm^3\)
A. \(27\pi {a^2}\)
B. \(24\pi {a^2}\)
C. \(25\pi {a^2}\)
D. \(21\pi {a^2}\)
A. \(\frac{{\sqrt 2 }}{3}{a^2}\)
B. \(\frac{3}{2}{a^2}\)
C. \(\frac{{\sqrt 3 }}{2}{a^2}\)
D. \(\frac{2}{3}{a^2}\)
A. \(81\pi {\rm{ c}}{{\rm{m}}^2}\)
B. \(60\pi {\rm{ c}}{{\rm{m}}^2}\)
C. \(78\pi {\rm{ c}}{{\rm{m}}^2}\)
D. \(36\pi {\rm{ c}}{{\rm{m}}^2}\)
A. \(S = \pi \frac{{\sqrt 3 }}{3}{a^2}\)
B. \(S = \pi \frac{{\sqrt 2 }}{2}{a^2}\)
C. \(S = \pi \frac{{\sqrt 3 }}{2}{a^2}\)
D. \(S = \pi \frac{{\sqrt 6 }}{2}{a^2}\)
A. \(\frac{{\sqrt {26} a}}{4}\)
B. \(\frac{{\sqrt {26} a}}{3}\)
C. \(\frac{{\sqrt {26} a}}{2}\)
D. \(\frac{{2\sqrt {26} a}}{3}\)
A. \(2\)
B. \(4\)
C. \(\frac{1}{2}\)
D. \(3\)
A. \(\frac{{\sqrt 3 }}{3}\pi {a^2}\)
B. \(\pi {a^2}\)
C. \(\sqrt 3 \pi {a^2}\)
D. \(2\sqrt 3 \pi {a^2}\)
A. \(R = \frac{{5\sqrt 2 }}{2}.\)
B. \(R = \frac{{5\sqrt 2 }}{3}.\)
C. \(R = \frac{{5\sqrt 3 }}{3}.\)
D. \(R = \frac{{5\sqrt 3 }}{2}.\)
A. \(4\pi \,\left( {{\rm{c}}{{\rm{m}}^{\rm{3}}}} \right)\)
B. \(8\pi \,\left( {{\rm{c}}{{\rm{m}}^{\rm{3}}}} \right)\)
C. \(16\pi \,\left( {{\rm{c}}{{\rm{m}}^{\rm{3}}}} \right)\)
D. \(32\pi \,\left( {{\rm{c}}{{\rm{m}}^{\rm{3}}}} \right)\)
A. \(S = 120\pi \,\left( {{\rm{d}}{{\rm{m}}^2}} \right)\)
B. \(S = 144\pi \,\left( {{\rm{d}}{{\rm{m}}^2}} \right)\)
C. \(S = 288\pi \,\left( {{\rm{d}}{{\rm{m}}^2}} \right)\)
D. \(S = 256\pi \,\left( {{\rm{d}}{{\rm{m}}^2}} \right)\)
A. \(12\pi {a^2}\)
B. \(8\pi {a^2}\)
C. \(24\pi {a^2}\)
D. \(16\pi {a^2}\)
A. \(\pi {a^3}\sqrt 3 \)
B. \(\frac{{\pi {a^3}\sqrt 3 }}{3}\)
C. \(\frac{{\pi {a^3}\sqrt 3 }}{6}\)
D. \(\frac{{\pi {a^3}\sqrt 3 }}{2}\)
A. \(9{a^2}\pi \)
B. \(\frac{{9\pi {a^2}}}{2}\)
C. \(\frac{{13\pi {a^2}}}{6}\)
D. \(\frac{{27\pi {a^2}}}{2}\)
A. \(\frac{{16}}{9}\)
B. \(\frac{4}{3}\)
C. \(\frac{3}{4}\)
D. \(\frac{9}{16}\)
A. \(\sqrt {2{R^2} - {d^2}} \)
B. \(\sqrt {{R^2} - 2{d^2}} \)
C. \(\sqrt {{R^2} + {d^2}} \)
D. \(\sqrt {{d^2} - {R^2}} \)
A. \({S_{tp}} = \frac{{4\pi }}{3}\)
B. \({S_{tp}} = 4\pi \)
C. \({S_{tp}} = 6\pi \)
D. \({S_{tp}} = 3\pi \)
A. \(R = \frac{{3\sqrt 3 }}{2}\)
B. \(R = \frac{{2\sqrt 3 }}{3}\)
C. \(R = \frac{{\sqrt 3 }}{3}\)
D. \(R = 2\sqrt 3 \)
A. \(V = \frac{{\pi \sqrt 3 \left( {1 + \sqrt 3 } \right)}}{2}\)
B. \(V = \frac{{\pi \left( {1 + \sqrt 3 } \right)}}{{24}}\)
C. \(V = \frac{{\pi \left( {1 + \sqrt 3 } \right)}}{{8}}\)
D. \(V = \frac{{\pi \left( {1 + \sqrt 3 } \right)}}{{3}}\)
A. \(\frac{{a\sqrt {30} }}{6}\)
B. \(\frac{{a\sqrt 6 }}{3}\)
C. \(\frac{{a\sqrt 3 }}{2}\)
D. \(a\)
A. \(V = 16\pi {a^3}\)
B. \(V = 12\pi {a^3}\)
C. \(V = 4\pi {a^3}\)
D. \(V = 8\pi {a^3}\)
A. \(a = 2\sqrt 3 R\)
B. \(a = \frac{{\sqrt 3 R}}{3}\)
C. \(a = 2R\)
D. \(a = \frac{{\sqrt {14} R}}{7}\)
A. \(\frac{{2\sqrt 2 }}{3}\pi \)
B. \(\frac{4}{3}\pi \)
C. \(\frac{2}{3}\pi \)
D. \(\frac{1}{3}\pi \)
A. \(\frac{{4\pi {a^3}}}{3}\)
B. \(4\pi {a^3}\sqrt 3 \)
C. \(\pi {a^3}\)
D. \(4\pi {a^3}\)
A. \(3\sqrt 3 {\rm{ c}}{{\rm{m}}^2}\)
B. \(6\sqrt 3 {\rm{ c}}{{\rm{m}}^2}\)
C. \(6 cm^2\)
D. \(3 cm^2\)
A. \(\pi {a^3}\)
B. \(\frac{{4\pi {a^3}}}{3}\)
C. \(\frac{{\pi {a^3}}}{3}\)
D. \(4\pi {a^3}\)
A. \(\frac{1}{2}\)
B. \(\frac{1}{4}\)
C. \(\frac{2}{3}\)
D. \(\frac{1}{3}\)
A. \(\frac{{8\pi {a^3}\sqrt 2 }}{3}\)
B. \(4\pi {a^3}\)
C. \(\frac{4}{3}\pi {a^3}\)
D. \(8\pi {a^3}\)
A. \(16\pi {a^2}\)
B. \(8\pi {a^2}\)
C. \(4\pi {a^2}\)
D. \(2\pi {a^2}\)
A. Chiều dài \(60 \pi\) cm, chiều rộng 60 cm.
B. Chiều dài 900 cm, chiều rộng 60 cm.
C. Chiều dài 180 cm, chiều rộng 60 cm.
D. Chiều dài \(30 \pi\) cm, chiều rộng 60 cm.
A. \(S = \frac{{28\pi {a^2}}}{9}\)
B. \(S = \frac{{7\pi {a^2}}}{9}\)
C. \(S = \frac{{28\pi {a^2}}}{3}\)
D. \(S = \frac{{7\pi {a^2}}}{3}\)
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