![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
:游泳池有甲、乙、丙三个注水管,如果单开甲管需要20小时注满水池;甲、乙两管合开需要8小时注满水池;乙、丙两管合开需要6小时注满水池;那么,单开丙管需要多少小时注满水池?()
A.10
B.10(10/11)
C.11
D.11(10/11)
查看答案
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.10
B.10(10/11)
C.11
D.11(10/11)
A.9
B.12
C.6
D.8
A.14
B.4
C.10
D.9
A. 20 B. 21 C. 20 D. 19
A.14
B.10
C.4
D.6
A.12
B.15
C.20
D.22
A.12
B.18
C.36
D.40
A.4小时
B.6小时
C.7小时
D.9小时
A.5
B.6
C.5.5
D.4.5
A.10
B.15
C.20
D.5