luas tabung [tex]2 \times \frac{22}{7 } \times 70(70 + 85)[/tex]

[tex]2 \times \frac{22}{7} \times 70 \times (70 + 85) \\ = \frac{44}{7} \times 70 \times 155 \\ = 44 \times 10 \times 155 \\ = 440 \times 155 \\ = 68.200[/tex]

Maaf Kalau Salah