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.\(2\pi {a^3}\,\,\left( {c{m^3}} \right)\)
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Hóa Học lớp 12
