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A swimming pool can be filled by one pipe in ten hours the drain pipe can empty the pool in 15 hours if both pipes are open how long will it take to fill the pool?
the rate that water is coming into the pool, is the amount of water in the pool (x) divided by the amount of time it take to fill the pool. x / 10
the rate to empty the pool is x / 15
the rate to fill the pool wile it is being emptied, is the rate filling the pool minus the rate emptying the pool.
x / 10 - x / 15
simplified
3x / 30 - 2x / 30
this gives x / 30
divide the rate the pool is filling, by the amount of water. (x / 30) / x this gives a time of 30 hours to fill the pool.
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A pool can be filled with water in 10 hours Draining the pool requires 20 hours If the pool is empty and the drain is open how much time will be needed to fill the pool?
Trick question. The pool is empty but the drain is open. With an open drain, the pool will never fill, unless the water entering exceeds the water draining.True,-----------> 20 hours
At the swimming pool certain pipe can fill it in 5 hours another pipe can fill it in 2 hours a third pipe can empty it in 6 hours with all 3 pipes turned on how much time would it take to fill?
The reciprocal of the added reciprocals. 1/T = 1/A + 1/B + ... 1/Z In your case: 1/T = 1/5 + 1/2 +1/6 1/T = 6/30 + 15/30 + 5/30 1/T = 26/30 T = 30/26 = 15/13 hours = 1 hour 9 minutes 14 seconds
How many hours before you plug on your refrigirator after travelling?
When moving your refrigerator from one property to another - you should let it stand (empty) in its new place for 12 hours before plugging it into the mains outlet. The same applies to a freezer unit.
Two brothers are digging a drainage ditch for a french drain around their home The ditch is to be 2 feet deep 1 foot wide and 40 feet long The older brother can dig the ditch in 14 hours The youn?
7.7 hours
What is the purpose of a 72 hour kit?
The purpose of a 72 hour kit is a backpack filled with stuff to last you 72 hours. These are supposed to be filled with items that can get you through a natural disaster until you can get help. A 72 hour kit should have bottled water, canned goods, a flashlight and batteries.
A pool can be filled with water in 10 hours Draining the pool requires 20 hours If the pool is empty and the drain is open how much time will be needed to fill the pool?
Trick question. The pool is empty but the drain is open. With an open drain, the pool will never fill, unless the water entering exceeds the water draining.True,-----------> 20 hours
A pipe can fill a swimming pool in h hours what part of the pool is filled in x hours?
Let part of swimming pool filled in x hours = y the pool filled in 1 hr = 1 \ h y = ( 1/h ) (x) y = x / h
A swimming pool can be filled using pipes Using pipe alone it takes 12 hours using both it takes 8 47 hours. How long does it takes using the hose alone?
If you want us to solve your homework, at least copy them here correctly. The question probably starts something like "A swimming pool can be filled using a pipe and a hose"...
If if takes pump A 6 hours to fill a tank and it takes pump B 12 hours to drain it then how long will it take to fill the tank?
Pump 'A' can fill 1/6 of the tank in one hour. 1/6 is the same as 2/12 Pump 'B' can drain 1/12 of the tank in one hour. If both pumps are running at the same time, then in one hour 2/12 get filled and 1/12 gets drained, and the net effect is 1/12 getting filled in that hour. If the tank is initially empty and both pumps start at the same time, then the tank will fill in 12 hours. *edit* It takes six hours if pump B is left off.
An empty swimming pool can be filled to capacity through an innlet pipe in 3 hours and it can be completely drained by a drained pipe in 6 hours if both pipe are fully open at the same time in how man?
Assuming the flow rate is constant (in a real system, this probably will not be the case, at least for the drain; it probably drains faster when nearly full than when nearly empty), then for convenience sake let's say the pool holds six units of water. It fills at 2 units per hour and drains at 1 unit per hour. If both pipes are open, the net gain is 1 unit per hour, so it will fill in six hours (and then start overflowing unless both pipes are shut off).
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