Question

Pipes A and B can fill a tank in 16 hours and 24 hours, respectively, whereas pipe C can empty the full tank in 40 hours. All three pipes are opened together, but pipe C is closed after 10 hours. After how many hours will the remaining part of the tank be filled?

• A.
• B. 2 hours
• C.
• D. 4 hours

Answer 1

Answer: (B)