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luas selimut = 616 cm kuadrat
luas permukaan = 8624
La = 22/7 x 14 x 14
La = 308 cm²
Ls = 2πrt
Ls = 2 x 22/7 x 14 x 7
Ls = 616 cm²
Lp = 2πr (r + t)
Lp = 2 x 22/7 x 14 (14 + 7)
Lp = 88 (21)
Lp = 1848 cm²