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tieu9477
2 năm trước
một ô tô và một xe máy cùng khởi hành để đi từ A đến B Với vận tốc của mỗi xê không đổi trên toàn bộ quãng đường AB dài 120km . do vận tốc của ô tô lớn hơn vận tốc của xe máy là 10km/h nên ô tô đến B sớm hơn xe máy là 36 phút . tính vận tốc mỗi xe
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