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tranphananhtho
2 năm trước
quãng đường từ thanh hóa vào hà nội dài 150km , 1 ô tô đi từ hà nội vào thanh hoá và nghĩ lại thanh hóa 3h15p rồi trở về hà nội ,hết tất cả là 10h . Tính vận tốc ô tô lúc về biết rằng vận tốc lúc đi lớn hơn vận tốc lúc về là 10km/h
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