rumus luas permukaan tabung
L. tab. = 2 π r (r + t)
= 2 . 22/7 . 21 (21 + 38)
= 44 . 3 . 59
= 7788 cm²
maaf kalau salah ya :D
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rumus luas permukaan tabung
L. tab. = 2 π r (r + t)
= 2 . 22/7 . 21 (21 + 38)
= 44 . 3 . 59
= 7788 cm²
maaf kalau salah ya :D