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maianhcho
2 năm trước
Một ôtô đi từ A đến B với vận tốc 50km/h và đến B ôtô nghỉ lại 1 giờ rồi sau đó từ B quay về A với vận tốc 45km/h. Tính quãng đường AB. Biết tổng thời gian là 3 giờ 32 phút.
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