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tranduy01685
2 năm trước
Một người đi xe mô tô từ A đến B, nếu vận tốc 35m/giờ thì đến B chậm 2 giờ. Nếu đi vận tốc 50m/giờ thì B đến sớm 1 giờ. Hãy tính khoảng cách AB.
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