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Lp lingkaran = Ling.bsr - Ling.kcl -> 22/7 . 14 . 14 - 22/7 . 10, 5 . 10,5 = 269,5 cm²
L tab + Lp lingkaran = 2326,5 + 269,5 = 2596 cm² (untuk 1 topi)
10 topi = 2569 cm² . 10 = 25690 cm² -> 2,569 m²
= 2326,5
Lp lingkaran = Lingkaran.besar - Lingkaran.kecil
x 14 x 14 - x 10, 5 x 10,5
= 269,5
L tabung + Lp lingkaran = 2326,5 + 269,5
= 2596 --> 1 topi
10 topi = 2569 x 10
= 25690
= 2,569