Question

Pipe a can fill a tank in 15 hours and pipe b can fill the tank in 20 hours. if both the pipes are opened on alternate hours and if pipe a is opened first, then in how much time (in hours) the tank will be full

Answer 1

Answer:

fill the tank in 12 hours and pipe B can fill the tank in 8 hours. A third pipe C empties tank in 15 hours. If all pipes are opened together then after 5 hours what portion of the tank will be filled.