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quananhb9
2 năm trước
Một ô tô đi từ A đến B và một xe máy đi từ B đến A. Nếu ô tô xuất phát trước xe máy 1 giờ 40 phút thì hai xe gặp nhau tại điểm C cách B 30 km. Nếu hai xe cùng xuất phát thì chúng gặp nhau tại điểm D cách B 60 km. Tính vận tốc của mỗi xe. Biết quãng đường AB dài 150 km.
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