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Ls = 2×phi×r×t = 2 × (22/7) × 7 × 16 = 704
V = phi×r×r×t = (22/7) × 7 × 7 × 16 = 2.464
(3)
Lpermukaan tanpa tutup
= phi×r×(r+2t)
= 3,14 × 6 × (6 + (2×35))
= 18,84 × 76
= 1.431,84