Question

Pipe A can fill a tank in 5hrs and B can empty it in 4 hrs. If both pipes are opened at the same time , when will the tan​

Answer 1

Answer:

Pipe A can fill the tank in 5 hours so it’s 1/5 or 12/60 per hour

Pipe B can fill the tank in 6 hours so it’s 1/6 or 10/60 per hour

Pipe C can empty the tank in 12 hours so it’s 1/12 or 5/60 per hour

Pipe A & B is 22/60 per hour Pipe C is 5/60 per hour

Revised Filling rate is 17/60 per hour = 3.529