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hoangvinhvi2005
2 năm trước
Một ôtô đi trên đoạn đường AB với vận tốc 50Km/h , rồi tiếp tục từ B đến C với vận tốc 45Km/h. Biết quãng đường tổng cộng dài 165 Km và thời gian ôtô đi trên đoạn đường AB ít hơn thời gian ôtô đi trên đoạn đường BC là 1 phần 2 giờ. Tính thời gian ôtô đi trên mỗi đoạn đường AB , BC .
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