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nly682828
2 năm trước
Khi giặt, vải bị co đi 1/16 theo chiều rộng và 1/18 theo chiều dài. Hỏi cần phải mua bao nhiêu mét vải khổ 80cm (tức chiều rộng) để sau khi giặt có 68m2 ? Đáp số: m.
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