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ducanh15062002
2 năm trước
Thực hiện kế hoạch đào một cái ao hình vuông trên góc của một thửa ruộng hình vuông.Diên tích vườn còn lại là 2925 mét vuông. Tính điện tích của cái ao biết cạnh của khu vườn hơn cạnh ao là 45 mét
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