user-avatar
phingo111
2 năm trước
Có 2 vòi nước,vòi thứ nhất chảy đầy bể trong 3 giờ,vòi thứ 2 có sức chảy=2 phần 3 vòi thứ nhất.Nếu vòi thứ nhất chảy vào, vòi thứ 2 tháo ra đồng thời thì sau bao lâu sẽ đầy bể ?
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

8. People report that the economy will grow by 2% this year  the economy 9. Journalists have reported that the President is ill  The President 10. Everyone knows that the statement was untrue.  the statement 11. Many people believe that the climate is changing.  The climate… 12. Everyone knows that he has been in prison 13. Many people say that the new prices are too high.  the new prices 14. They claim that this diamond is the largest in the world.  The diamond……. 15. I hate people staring at me  I 16. I don’t like people talking about me (object)  17. Everyone thought that he was lying –  He 18. People believe that a spy revealed the secret.  A spy… 19. Journalists report that the war is over  The war 20. People think that the wheel was invented three or four thousand years ago  The wheel

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team