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Ducga079099
2 năm trước
Hai địa điểm A và B cách nhau 32km. Cùng 1 lúc xe máy khởi hành từ a đến b, một xe đạp khởi hành từ b về a sau 48p thì gặp nhau. Tính vận tốc mỗi xe, biết vận tốc xe máy nhanh hơn vận tốc xe đạp 16km/h
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