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havy201999999999
2 năm trước
Bài 4. Một máy bay bay với vận tốc 800 km/h từ Hà Nội đến Thành phố Hồ Chí Minh. Nếu đường bay Hà Nội – Hồ Chí Minh dài 1400 km thì máy bay phải bay trong bao nhiêu lâu? A. 1 giờ 20 phút B. 1 giờ 30 phút C. 1 giờ 45 phút D. 2 giờ
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