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t = 44 - 20 = 25 cm
L bola = 4πr²
= 4 × 3,14 × 10 × 10 cm²
= 1256 cm²
L selimut tabung = 2πrt
= 2 × 3,14 × 10 × 25 cm²
= 1570 cm²
L P seluruh = 1256 + 1570
= 2826 cm²