tolong kerjakan ,makasih

22/7x18x14=792cm...........

Luas permukaan tabung
= 2 × π × r × (t + r)
= 2 × 22/7 × 7 × (18 + 7)
= 44/7 × 7 × (18 + 7)
= 44 × (18 + 7)
= 44 × 25
= 1100 cm²

Jadi jawabannya a.1100 cm²

Semoga membantu ^_^