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hlu88093
2 năm trước
Một đám đất hình thang có đáy lớn 66m và hơn đáy bé 18m. Chiều cao bằng 1/3 tổng hai đáy. Mùa vừa qua, người ta trồng lúa thu hoạch cứ 100m2 được 65kg lúa. Hỏi mùa vừa qua thu được mấy tấn lúa?
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