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lephuc1001
2 năm trước
Một vỏ lon nước ngọt dạng hình trụ có đường kính đáy 6cm , chiều cao trục là 12 cm . Tính nguyên vật liệu dùng để lm nên 1 chiếc vỏ lon đó ( ko kể nếp hàn) và thể t ích nc ngọt chứa đầy trong vỏ lon
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