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buivanlam805
2 năm trước
x : 1,75 = 23,15 + 2,85 Bài 3: Một căn phòng hình chữ nhật có chiều dài là 34m và chiều rộng bằng 3/4 chiều dài. Tính diện tích của căn phòng đó. Người ta dùng gỗ để lát sàn căn phòng đó. Hỏi phải tốn bao nhiêu tiền mua gỗ để lát sàn, biết giá tiền 2m2 gỗ sàn là 500000 đồng ?
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