0
9 large pipes drains a pond in 8 hours and 6 small pipes drains a pond in 16 hours How long will 3 large pipes and 5 small pipes take to drain a pond?
If 9 large pipes take 8 hours to drain the pond,
then 1 large pipe would take 8*9=72 hours.
large_pipe_rate = (1/72) pond/hour
Since 6 small pipe drain the pond in 16 hours,
then 1 small pipe would take 6*16 = 96 hours.
small_pipe_rate = (1/96) pond/hour
Now we can calculate using:
rate * time = work done
In this case, we have two rates, but a common time,
so we will have:
(3*large_pipe_rate)*time + (5*small_pipe_rate)*time = 1
Plug in the values we know and solve for "time":
(3*large_pipe_rate)*time + (5*small_pipe_rate)*time = 1
(3 * (1/72))*time + (5 * (1/96))*time = 1
(3/72)*time + (5/96)*time = 1
(3/72 + 5/96)*time = 1
time = 1/(3/72 + 5/96)
time = 1/.09375000
time = 10.66666667
Answer:
3 large pipes and 5 small pipes could drain
the pond in 10 and 2/3 hours (which is
10 hours and 40 minutes).
-----------------------
The other answers disagree with me. I would like you to
get this problem correct, and to be honest, I'd like the
points for showing the correct way to do it. So, I'll take
a moment to show you why the other answers don't
even make sense.
Consider if all 8 pipes were large. We know that *9*
large pipes could drain the pond in 8 hours. With a
little calculation, we can see that 8 large pipes could
drain it in 9 hours:
8 * (1/72) * time = 1
(1/9) * time = 1
time = 9 hours
If all 8 pipes were small, then it would take:
8 * (1/96) * time = 1
(1/12)* time = 1
time = 12 hours
So we **know** it will be somewhere between 9
and 12 hours. Certainly NOT 16 hours.
Go back to the problem statement and notice that 6
small pipes can drain the pond in 16 hours. The other
answers claim that 5 small pipes + 3 large pipes also
take 16 hours. Therefore, their claim is that:
6 small pipes = 5 small pipes + 3 large pipes
In other words, by removing 1 of the 6 small pipes and
adding 3 large ones, the drain time remains at 16 hours:
1 small pipe = 3 large pipes
Nonsense.
Bottom line:
3 large + 5 small will take 10 hours and 40 minutes.
What else can I help you with?
A tank can be filled in 18 hours by Pipe A or in 24 hours by Pipe B How much time would be needed for both pipes to fill the tank?
10 2/7 hours
One pipe can fill a pool in 12 hours while a second pipe can fill the same pool in half the time How long would it take to fill the pool if both pipes are used?
4hr.
One pipe can fill the tank in 2 hours and another pipe can fill a tank in 5 hours. how many hours will it take if both pipes are open at the same time?
Pipe 1: 0,5 tanks per hour (2 hours to fill)Pipe 2: 0,2 tanks per hour (5 hours to fill)If we let X be the time in hours to fill the tank:0,5 * X + 0,2 * X = 1 (one tank filling)0,7 * X = 1X = 1 ÷ 0,7 = 1.428571429... ≈ 1.43 hours or almost 1 hour 26 minutes
The panpipe usually has or more pipes of gradually increasing length that are stopped at one end?
ten
Which would carry more water 1 two foot pipe or 2 one foot pipes?
same
Features drains metal pipes etc?
The drain metal pipes are usually coated and galvanized because of the hard water.
What is an over flow drain?
They are secondary drains that work in tandem with the primary pipes to prevent overflows.
When the toilet flushes it responds normally however after a few minutes the bowl drains completely of water there does not appear to be any leaks anywhere?
Check for a clogged air gap (the pipes that run from the large drain pipes to the roof of the house).
How do scorpions get in drains?
Scorpions can enter drains through cracks or openings in the pipes or through drain covers that are not securely fitted. They are attracted to dark, damp environments and may accidentally fall or crawl into drains while searching for shelter or food.
How effective is drain snaking in clearing clogged pipes?
Drain snaking is generally effective in clearing clogged pipes by breaking up and removing blockages. It is a common method used by plumbers to address clogs in drains.
Why does the toilet slowly drain?
The toilet drains slowly when there is a blockage in the pipes, a clog in the toilet trap, or a malfunction in the flushing mechanism.
how to locate clean out drain my house was built in 1963 I have no clue where to look.?
To clean out the main drain line, find the clean-out plugs located on the large drain pipes. Look for these plugs on the vertical pipes in your basement or crawl space. In some houses these drains may be located in a garage or pantry closet, or there may be access to these plugs outdoors along the foundations of your house. Usually these pipes will be vertical, but occasionally a plug may be located on a horizontal pipe.
What cleaner is best for rust removal in drains?
Nothing dissolves rust in drain pipes. Once pipes become so old and rusty that they constantly keep blocking up, its time to replace and install PVC waste pipes.
Is there a product I can put in the drains to clear pipes of hairs?
Drain-o works very well. You can find this product at your local grocery store.
Why does my dishwasher drain into the sink?
Your dishwasher drains into the sink to connect to the existing plumbing system in your kitchen. This allows the dirty water from the dishwasher to be efficiently carried away through the sink's drain pipes.
How does kitchen waste block the drains?
Kitchen drains get blocked for various reasons:There might be a rough bit of piping in the drain. Gradually small things get caught there and eventually build up a blockage.Something large went down your sink and got caught on a bend.Hot water and melted grease runs down the drain. When the grease hits the cold pipes it congeals and forms a layer on the side of the drain, like cholesterol in your arteries. Gradually this builds up.Make sure nothing goes down your kitchen drains except water. That is the solution.
Why do my drains smell and how can I get rid of the unpleasant odor?
Drains can smell due to a buildup of food, grease, or bacteria in the pipes. To get rid of the odor, you can try pouring boiling water down the drain, using a mixture of baking soda and vinegar, or using a commercial drain cleaner. Regularly cleaning your drains can help prevent the unpleasant smell from returning.
