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haquocviet0
2 năm trước
Một ô tô dự định đi với vận tốc 48km/h.Sau khi đi được 1 giờ với vận tốc đó thì nghỉ mất 10 phút.Sau đó đi tiếp với vận tốc lớn hơn vận tốc cũ là 6km/h và đến đích đúng thời gian dự định.Hỏi độ dài quãng đường đó là bao nhiêu?
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