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lifeforlife
2 năm trước
Diện tích toàn phần của hình lập phương thứ nhất là 54cm2, diện tích toàn phần của hình lập phương thứ haI là 216cm2. Hỏi cạnh của hình lập phương thứu hai dài gấp mấy lần cạnh của hình lập phương thứ nhất?
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