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thithocaiqq
2 năm trước
Luc 7 gio sang mot nguoi di xe dap tu A den B voi van 15 km/h . Sau 2 giờ một người khác đi từ B đến A với vận tốc 40 km/h . Biết quãng dường AB dài 140 km . Hỏi đến mấy giờ hai người gặp nhau . Giúp mik với ạ 😃
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