Penjelasan dengan langkah-langkah:
1/3×π×r×r×t
1/3×22/7×21×21×30
22×3×21×10
13.860
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Penjelasan dengan langkah-langkah:
1/3×π×r×r×t
1/3×22/7×21×21×30
22×3×21×10
13.860