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quynhanh1108
2 năm trước
1 ô tô đi từ A đến B với vận tốc 60 km/h cùng lúc đó 1 xe máy đi từ A đến B với vận tốc 40 km/h sau 2h3' 2 xe gặp nhau .Tính quãng đường từ A đến B
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