r = d : 2 = 14 : 2 = 7
Luas permukaan tabung
[tex]\pi \times d(r + t) \\ \frac{22}{7} \times 14(7 + 26) \\ 44(33) \\ 1.452 \: {dm}^{2} \: (D)[/tex]
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r = d : 2 = 14 : 2 = 7
Luas permukaan tabung
[tex]\pi \times d(r + t) \\ \frac{22}{7} \times 14(7 + 26) \\ 44(33) \\ 1.452 \: {dm}^{2} \: (D)[/tex]