Question

Pipe A can fill a tank in 12 hours, and Pipe B can fill it in 15 hours. Pipe C can empty the full tank in 20 hours. If all three pipes are opened together, how much time will it take to fill the tank?

A 10 hrs
B 12 hrs
C 18 hrs
D 22 hrs
Practice Next

More Pipes and cisterns Questions

Hey! Ask a query