Luas permukaan tabung
[tex]2 \times \pi \times r(r + t) \\ 2 \times \frac{22}{7} \times 14(14 + 10) \\ 88(24) \\ 2112 \: {cm}^{2} [/tex]
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Luas permukaan tabung
[tex]2 \times \pi \times r(r + t) \\ 2 \times \frac{22}{7} \times 14(14 + 10) \\ 88(24) \\ 2112 \: {cm}^{2} [/tex]