F1 fills one-eighth per minute, F1 & F2 together fill one-fifth per minute, so F2 is responsible for one-fifth less one-eighth ie three-fortieths per minute so F2 alone would take 40/3 ie 13 min 20 sec.
We're guessing that the question is trying to ask:If one pipe can fill the tank in 9 minutes, and another pipecan empty the tank in 12 minutes, how long does it take thetank to fill if both pipes are open ?So that's the question we'll go ahead and answer.The first pipe fills 1/9th of the tank every minute.The second pipe empties 1/12th of the tank every minute.When they're both open, (1/9 - 1/12) of the tank fills every minute.(1/9) - (1/12) = (4/36) - (3/36) = 1/36Since 1/36th of the tank fills every minute, it takes 36 minutes to fill.
30 minutes, IF (both are AM OR both are PM) AND (both are on the same day).
The inlet valve fills 1/6th of the vat in an hour.The outlet valve drains 1/10th of the vat in an hour.When they are both open, (1/6th - 1/10th) of the vat fills in an hour.(1/6 - 1/10) = (5/30 - 3/30) = 2/30 = 1/15th fills in one hour.So with both valves open, it takes 15 hours to fill the vat.
In one hour first pipe fills 1/7th of pool, other pipe fills one-half, so together in one hour they fill 1/7 + 1/2 ie 9/14 so would take 14/9 hours (93 and a third minutes) to fill the pool. ie 1 hr 33 min 20 sec
0.75
Taps and faucets are both used to control the flow of water from a plumbing system, but the term "tap" is more commonly used in British English while "faucet" is more commonly used in American English. Generally, taps are found outdoors or in bathrooms, while faucets are commonly found in kitchens.
There is a hot/cold cross connection at one or more of the faucets at you house. make sure all faucets are shut off both hot and cold. If it still occurs more than likely you have a Moen faucet somewhere (most likely).
Generally both handles turn towards the center. On some, both turn counter clockwise to open. A single faucet will usually turn counter clockwise to open.
If it just turns and does not shut off the threads are striped on the end of the stem the handle is on. There is enough variance in faucets both in style and age that finding a new stem is unlikely. Time for a new faucet.
When buying bathroom faucets, one is faced with a multitude of styles and brands. Personal taste will be the deciding factor in which type of faucet you buy. To help narrow it down a bit, look at Kohler and Delta faucets. Both of these brands are well known and very reliable. Kohler offers some great styles with good functionality. If you like simplicity, Delta has a wonderfull selection.
Oil rubbed bronze bathroom faucets can be purchased from many retailers, both online and in-store. Some brick and mortar stores where they can be purchased are Lowe's and Home Depot. Online they can be purchased from Amazon or Overstock.
It would be much cheaper to just replace the faucet. Those faucets usually result in reduced resale value of a home anyway, so replacing with a more aesthetically-pleasing version will help you both ways.
it wouldn't overflow
It sounds as if you have a leak in the 'stem seal' in the faucet. This often a rubber 'o' ring around the actual shaft holding the main seal. You must switch off somewhere before this ( possibly under counter) then take apart the faucet and replace both seals.
Usually air in the lines or possibly worn washers in the faucets.
If you notice reduced pressure in one of your faucets and not other faucets, and notice that the flow is reduced in both the hot and cold sides of the same faucets then it is probably your aerator. If it is only on one side of your faucet (hot or cold side) then it is probably a mineral buildup in the valve of the faucet (you can clean that side or replace the valves components.) You can also try to loosen the mineral deposits by... first removing the aerator then turn off the supply line valve ( the valve under the sink, several times) to try and dislodge the mineral deposit; if you leave the drain stopper closed and place a dark colored wash rage in the sink, you may notice the deposits flowing through the faucet. While you have the aerator removed clean that or replace it, they are cheap.) If all this fails then you will probably have to replace the valve under the sink.
Moen and Kohler both make low flow faucets for the bathroom. They provide them in several styles each.