| 1. | A tank can be filled with water by two pipes A and B together in 36 minutes. If the pipe B was stopped after 30 minutes, the tank is filled in 40 minutes. The pipe B can alone fill the tank in ? | |
|
45 minutes
|
||
|
60 minutes
|
||
|
75 minutes
|
||
|
90 minutes
|
||
View Answer
Discuss in Forum
Report Question