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linhchimelt
2 năm trước
B11: Hai xe khởi hành cùng một lúc, tại hai điểm A và B cách nhau 100km và sau 1 giờ thì gặp nhau. Tính vận tốc của mỗi xe, biết rằng xe đi từ A có vận tốc lớn hơn xe đi từ B là 10km/h
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