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congduyalt
2 năm trước
Người ta trồng trên một mảnh đất HCN có chu vi là 600m chiều rộng kém chiều dài 50m . A, Tính diện tích mảnh đất đó. B, Biết rằng cứ trung bình 100m vuông thú hoạch được 30kg ngô . Hỏi trên cả thửa ruộng đó người ta thu hoạch được bao nhiêu tạ ngô
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