A. \(\dfrac{{80\pi }}{5}\,\,\left( {c{m^3}} \right)\)
B. \(\dfrac{{80\pi }}{7}\,\,\left( {c{m^3}} \right)\)
C. \(\dfrac{{80\pi }}{3}\,\,\left( {c{m^3}} \right)\)
D. \(\dfrac{{70\pi }}{3}\,\,\left( {c{m^3}} \right)\)
C
\({V} = \dfrac{1}{2}{V_\text{cầu}} + {V_\text{trụ}} + {V_\text{nón}}\\ = \dfrac{1}{2}.\dfrac{4}{3}\pi {.2^3} + \pi {.2^2}.4 + \dfrac{1}{3}\pi {.2^2}.4\\ = \dfrac{{80\pi }}{3}\,\,\left( {c{m^3}} \right)\)
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