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Lp = πr² + 2πrt
Lp = 22/7 . 35 . 35 + 2 . 22/7 . 35 . 80
Lp = 3850 + 17600
Lp = 21450 cm²
Luas Selimut
Ls = 2πrt
Ls = 2 . 22/7 . 35 . 80
Ls = 17600 cm²