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camnhungpham32
2 năm trước
Cần gấp hứa vote 5 sao Một ô tô đi từ A đến B với vận tốc 60km/h và đi từ B về A với vận tốc 45km/h. Thời gian cả đi lẫn về hết7 giờ. Tính quãng đường AB
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