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Belum mengerti?
Diameter tabung = 2 + 2 cm = 4 cm.
Diameter lubang = 2 cm.
Rumus volum tabung = [Luas Alas] * [Tinggi]
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Belum mengerti? Tanda "^" di bawah adalah pangkat.
Volume pipa = [volume tabung] - [volume lubang]
Volume pipa = [pi * 4 ^ 2 * 14] - [pi * 2 ^ 2 *14]
Volume pipa = [22/7 * 16 * 14] - [22/7 * 4 * 14]
Sudah dapat kan hasilnya? :)