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thanh1908.xx
2 năm trước
Một ô tô đi quãng đường 200km thì tiêu thụ hết 24lít xăng. Trong bình căng đã có 4lít xăng. Ô tô cần đi một đoạn đường trong 10 giờ với vận tốc 45km/giờ thì cần đổ bn lít xăng để đi hết quãng đường?
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