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trantien93112001
2 năm trước
Câu 2: Hai xe ô tô khởi hành đồng thời tại 2 địa điểm A và B cách nhau 80 km. Nếu đi cùng chiều về C ( nằm ngoài B) thì sau 1 h 40 phút hai xe cách nhau 120 km. Nếu đi ngược chiều thì sau 30 phút hai xe cách nhau 20 km. Tính vận tốc của hai xe.
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