1.Một bản đồ có tỉ lệ như sau ;1:2000000.Người ta đo dược khoảng cách trên bản đồ là 5cm .Hỏi khoảng cánh thực tế là bao nhiêu km 2.Em hay phân loại các tỉ lệ bản đồ sau; 1:150.000 1:250.000 1:1.500.000

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