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levanvy1
2 năm trước
1Một ca nô đi xuôi dòng với v = 29 km/ giờ và đi ngược dòng v= 24 km / giờ a tìm vận tốc thực của ca nô b nếu ca nô đi xuôi dòng đoạn sông dài 34,8 km hết bao lâu c nếu ca nô ngược dòng sông dài 34,8 km hết bao lâu 2 Một xuồng máy đi trong nước yên lặng có vận tốc 25 km / giờ với vận tốc đó khi xuôi dòng có vận tốc dòng nước chảy 5 km/ giờ thì sau 2 giờ xuồng máy bay đi được ? Km Giúp mình với ai nhanh cho vote 5 và câu hỏi hay nhất
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