Penjelasan dengan langkah-langkah:
luas permukaan
= 2πr(r+t)
= 2x22/7x21 (21+10)
= 2x66x31
= 4092cm
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Penjelasan dengan langkah-langkah:
luas permukaan
= 2πr(r+t)
= 2x22/7x21 (21+10)
= 2x66x31
= 4092cm