Inlet and outlet

The pool has a capacity of 50 hl. The inlet pipe flows in 1 minute 1.25 hl, and the waste pipe outlet is draining the full pool in 50 minutes. How long will it take the empty the full pool when both the inlet and outlet are opened at the same time?

Correct answer:

t =  200 min

Step-by-step explanation:

$$\begin{gathered} V=50\text{ hl } \\ {v}_1=1.25\text{ hl/min } \\ {v}_2=V\mathrm{/}50=50\mathrm{/}50=1\text{ hl/min } \\ t=V\mathrm{/}(v_1-v_2)=50\mathrm{/}(1.25-1)=200\text{ min} \end{gathered}$$

Try another example

Related math problems and questions:

• Inlet minus outlet
  Water flows into the tank through two pipes and flows out of the third pipe spontaneously. Pipe A itself would fill the tank in 3 hours, pipe B itself would fill in 4 hours, and pipe C would flow out in 12 hours. How long will the tank be full if all thre
• Water inlets
  Inlet valve with a flow rate of 12 liters per second is filled tank for 72 minutes. How long take to fill full tank if we open one more such valve half an hour after?
• Five pumps
  The water tank is filled with two pumps in 48 minutes. How long would it take to fill it with 5 same pumps?
• Three
  Three pavers will pave the sidewalk in 4 days. How long does it take for two tiles to pave the same sidewalk?
• Pool 2
  The first supply by the pool fill for five hours and the second fill for six hours, drain should be drained for 15 hours. For how many hours the pool is full, when we open both inlet now and outlet open two hours later?
• Supermarket cashiers
  When at the supermarket are opened only 2 cash people waiting in the front approximately 12 minutes. How many will shorten the average waiting time in a front where supermarket open another three cashiers?
• Four workers
  Four workers lay on the gym floor in six hours. After an hour of working together, one of the workers went to the doctor. How long will it take for the remaining three workers to complete their work?
• Inflow - outflow
  The tank will fill by inflow for 143 minutes and empties by outflow for 150 minutes. How long take to fill tank if it is also opened the inflow and outflow?
• The work
  The work was to be done by 150 workers. At the beginning of their work, their number reduced by 40, which increased the time of work by 5 and 1/3 of the schedule. How long did work take?
• Water pool
  Pool with volume 990hl completely filled, if water flows by one tap 8 hours and by second tap 6 hours. First tap give 10hl more than second per hour. How many hl flows in each of them in an hour?
• Two boats
  The sightseeing boat sail at 25 km / h. The cruise take 6 hours. How long the another boat sails at 60 km/h?
• Gasoline
  For nearly full tank of 40 liters of gasoline chauffeur paid 54 euros. How many euros it will cost to go 250 km long if the car has an average fuel consumption 7 liters per 100 kilometers?
• Pool
  Pool is filled with two water supply. The first supply fill pool for nine hours, the second for six hours. How many hours will take fill the pool when the water flows in through the first supply 3 hours and then we will open a second supply?
• Water level
  To cuboid-shaped poll, bottom size 2m and 3.5m; flows water at a rate of 50 liters per minute. How long will it take for water to reach level 50 cm?
• Diggers
  The excavation was carried out in 4 days and 5 workers worked on it for 7 hours a day. Determine how long it would take to excavate if 7 workers worked on it 8 hours a day.
• In and out
  The empty tank is filled in 12 minutes and empty in 16 minutes. How long does it take to fill if we forgot to close the drain? If the tank has 1000 l.
• A lot of hay
  Martin's grandfather weighed a lot of hay and calculated that for 15 rabbits it last in 100 days. How many days will this lot be enough for 25 rabbits?