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Tmp1109
2 năm trước
Hai ô tô xuất phát từ A và B cùng một lúc và đi ngược chiều nhau,sau hai giờ chúng gặp nhau.Quãng đường AB dài 180km.Tìm vận tốc của mỗi ô tô,biết rằng vận tốc đi từ A bằng 2/3 vận tốc ô tô đi từ B
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