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datlqd97
2 năm trước
Một mảnh vườn hình thang có tổng số đo hai đáy là 140m , chiều cao bằng 2/7 tổng số đo hai đáy a) Hỏi diện tích mảnh vườn này là bao nhiêu mét vuông b) Người ta sử dụng 30,5% diện tích mảnh vườn để trồng xoài . Hãy tính diện tích trồng xoài
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