[tex]r =56 \div 2 = 28 \\ t = 56 + 30 = 86 \\ \\ volume \: tabung \\ \pi \times r \times r \times t \\ \frac{22}{7} \times 28 \times 28 \times 86 \\ 211.904 \\ \\ volume \: agar \: penuh \\ 211.904 - 54.786 \\ 157.118 \: {cm}^{3} \: (a)[/tex]
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[tex]r =56 \div 2 = 28 \\ t = 56 + 30 = 86 \\ \\ volume \: tabung \\ \pi \times r \times r \times t \\ \frac{22}{7} \times 28 \times 28 \times 86 \\ 211.904 \\ \\ volume \: agar \: penuh \\ 211.904 - 54.786 \\ 157.118 \: {cm}^{3} \: (a)[/tex]