Penjelasan dengan langkah-langkah:
[tex]luas \: selimut \: tabung \\ = 2\pi \: r \times t \\ = 2 \times \frac{22}{7} \times 11 \times 28 \\ = 2 \times 22 \times 11 \times 4 = 1936 {cm}^{2} [/tex]
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Penjelasan dengan langkah-langkah:
[tex]luas \: selimut \: tabung \\ = 2\pi \: r \times t \\ = 2 \times \frac{22}{7} \times 11 \times 28 \\ = 2 \times 22 \times 11 \times 4 = 1936 {cm}^{2} [/tex]