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huynhnguyn101
2 năm trước
một miếng đát hình chữ nhật có chiều dài 40m, trên miếng đất người ta đào một ao cá có diện tích 30m2, chiếm 7.5% diện tích miếng đất. hỏi miếng đất đó có chu vi bằng bao nhiêu ?
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