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How long will it take for a sink to fill if it empties in 4 minutes and fills in 3 minutes?
Wiki User
∙ 14y ago
Fills in 3 minutes ===> gains 1/3 sink per minute. Empties in 4 minutes ===> loses 1/4 sink per minute. With faucet and drain open simultaneously, gain is [ (1/3) minus (1/4) ] sink per minute = (4/12) - (3/12) = 1/12 sink per minute. Time to gain 1 whole sink = 1/(1/12) = 12 minutes to fill.
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∙ 14y ago
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How long will it take a tank to be be filled by one pipe in 9 minutes and drained by another pipe in 12 minutes?
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.
A pool can be filled by one pipe in 7 hours and by a second pipe in 2 hours How long will it take using both pipes to fill the pool?
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
Jim can fill a pool carrying buckets of water in 30 minutes sue can do the same job in 45 minutes tony can all three fill the pool together?
Since you didn't write the Tony's time, let find for how long Jim and Sue can fill the pool together. Jim can fill 1/2 of the pool in 15 minutes. Sue can fill 1/3 of the pool in 15 minutes. Together can fill 5/6 of the pool in 15 minutes (1/2 + 1/3). In how many minutes (let's say x minutes) they will fill 1/6 of the pool? Since it is left a small piece of the pool to fill out, it will take a few minutes to fill it. So we can form a proportion such as: (5/6)/(1/6) = 15/x 5/1 = 15/x cross multiply 5x = 15 divide both sides by 5 x = 3 It will take 3 minutes to fill 1/6 of the pool. So that together they will fill the pool in 18 minutes (15 + 3).
A winery has a vat with two valves The inlet valve can fill the cat in 6 hours The outlet can empyty it in 10 hours How long with it take to fill the vat if both valves are left open?
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.
If you have a 6000 liter tank it takes one pipe to fill it in 50 minutes and the other pipe in 75 minutes how long will it take both pipes at the same time?
It would take the too pipes 30 minutes to fill the tank when working together.This figure can be found in the following manner:Find the fill-speed of the first pipe50 minutes to fill 6000 Liters. 6000L/50m gives us 120L/m (liters-per-minute)6000 Liters in 75 minutes = 6000L/75m = 80L/mNext find the speed of the second pipeNow we combine the two rates (120+80), and we find that the pipes have a combined fill-speed of 200L/mFinally, we determine that it takes 30 minutes to fill the tank at 200L/m
If one bath tap fills a bath in 9 minutes and the other in 4 and the bath empties in 5 minutes if both taps are on and the plug is out how long will it take for the bath to overflow?
it wouldn't overflow
How long will it take a tank to be be filled by one pipe in 9 minutes and drained by another pipe in 12 minutes?
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.
If it takes chis 30 minutes to fill the pool and Sarah 45 minutes to fill the pool and Billy 90 minutes to fill the pool how long will it take all 3 to fill the pool?
chis fills (1/30) of the pool every minute.Sarah fills (1/45) of the pool every minute.Billy fills (1/90) of the pool every minute.Working together, they fill [ (1/30) + (1/45) + (1/90) ] every minute.(1/30) + (1/45) + (1/90) = (3/90) + (2/90) + (1/90) = (6/90) = 1/15Together, they fill (1/15th) every minute, so it takes 15 minutes to fill it completely.
One pump can fill a pool in ten minutes another can fill the pool in 15 minutes how long to fill the pool if both pumps are running?
The first pump fills (1/10th) of the pool in 1 minute.The second pump fills (1/15th) of the pool in 1 minute.With both running, they fill(1/10 + 1/15) = (3/30 + 2/30) = 5/30 = 1/6th of the pool in 1 minute.They have to run for [ 1 / (1/6) ]= 6 minutes in order to fill the pool.
The cold tap fills a bath in 30 secondsthe hot tap fills the bath in 15 secondshow long will it takes to fill the both if tap are turned on together?
10 seconds
How long does it take to fill a bath tub?
About 3 minutes! But if its a big tub about.......5 minutes.
Which gas fills a balloon faster?
It doesn't matter as long as the conditions are the same. Temperature, gas pressure, speed with which you fill the balloon, and so on.
If it takes 45mins to fill a bucket with water from hose 1 and it takes 30mins to fill another bucket from hose 2 How long would it take to fill a bucket using hose 1 and 2 at the same time?
Assuming the buckets are identical... Hose 1 fills 1/45 per minute and hose 2 fills 1/30 per minute, so together in one minute they would fill 1/45 + 1/30 ie 5/90 or 1/18, ie the bucket would be filled in 18 minutes.
If Jim can fill a pool in thirty minutes Sue can fill a pool in forty five minutes and tony can fill the pool in an hour and a half how long will it take all three to fill the pool together?
.50+.75+1.5=2.75/3=.91666666667=55/60 55 Minutes
A pool can be filled by one pipe in 7 hours and by a second pipe in 2 hours How long will it take using both pipes to fill the pool?
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
A large pipe can fill a pool in 9hrs if a large and a small pipe can fill this pool in 6 hrs when used togheter how long would it take the smaller pipe to fill the pool alone?
large fills 1/9 per hour, large and small fill 1/6 per hour so small fills 1/6 - 1/9 per hour, ie 1/18, so small alone would take 18 hours.
How long did it take to fill the titanic tank?
There were two hours and forty minutes between the crash and the sinking.
