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Mathematics, 01.08.2021 14:00 calibaby1220

1 oto đi từ A đến B với vận tốc trung bình 50km/h. Khi từ B về A xe đi với vận tốc 60km/h nên thời gian về ít hơn thời gian đi 30’. Tính độ dài quãng đường AB

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1 oto đi từ A đến B với vận tốc trung bình 50km/h. Khi từ B về A xe đi với vận tốc 60km/h nên thời g...

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