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huutuan169dn
2 năm trước
trên quãng đường AB dài 156 km, một người đi xe máy từ A và một người đi xe đạp từ B .Hai xe xuất phát cùng một lúc và sau 3 giờ giờ thì gặp nhau .Biết rằng vận tốc của xe máy lớn hơn vận tốc của xe đạp Là 28 km/h .Tính vận tốc mỗi xe
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