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Để lát sàn một căn phòng hình chữ nhật có chiều dài 12m, chiều rộng bằng 2/3 chiều dài, người ta đã dùng các viên gạch hình vuông có cạnh 40cm . Hỏi để lát căn phòng đó cần phải dùng hết bao nhiêu viên gạch? Gấp cực kì lun nha, bạn nào giải đc tui cho làm sư phụ
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