Question

A pipe A can fill a cistern in 6 hours. Pipe B can fill the same tank in 8 hours
and Pipe C can empty the tank in 12 hours. If all the pipes are opened
together then how much time will it take to fill the tank?

Answer 1

Answer:

3 1/3 hours

Step-by-step explanation:

Part of the tank filled by pipe A and B in 2 hrs.

=2(61+81)=2(244+3)=127

Remaining part =1−127=125, This part is filled by pipe B.

∴ Required time =125×8=310=331 hrs