Diketahui tinggi tabung = diameter bola, yaitu 40 cm. Luas seluruh permukaan banguna adalah
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Jawab:
Penjelasan dengan langkah-langkah:
Lp = Lptabung tanpa tutup + ½bola
= πr (r + 2t) + ½.4πr²
= 3,14.20 (20+2.40) + 2.3,14(20)²
= 62,8.100 + 6,28.400
= 6280 + 2512
= 8792cm²
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