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angelmiku098
2 năm trước
2 ô tô khởi hành cùng một lúc để đi từ A đến B trên quãng đường AB dài 120 km 。Biết rằng vận tốc trung bình của ô tô thứ nhất lớn hơn vận tốc trung bình của ô tô thứ hai là 12 km/h 。Vì vậy Ô tô thứ nhất đã đến B trước ô tô thứ hai là 30'。 Tính vận tốc trung bình của mỗi ô tô?
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