volume of water

So it would be 6" pipe = 3"x3.14=9.72" x 50' ( 12x50)= 600"

9.72" x 600" = 5832 cu. in.

231 cu. in = 1 gallon

5832" divided by 231=25.2 gallon ?

Is this correct?

Thanks in advance

Pi * radius² * length

So I think you're off, I only saw one radius in there (I think)

OK so if the problem is volume oh h2o in a 6" pipe that is 50 ' long it would be:

r= pi r2

3.14 x 3 x 3=19.26"

length = 50' x 12"= 600"

600 x 19.26=14,556 sq.in.

231 sq in= 1 gallon

so: 14,556 divided by 231=62.5 ?

Hope that's it??

Thanks

tony

Units units units

length = 50' x 12"= 600" This is a bit of Length X Width = Area

Should be

length = 50' x 12" / 1' = 600" the length in inchs , not a area

Dimensional analisys.

Any way a 6" inch asa pipe does not have 6" in internal diameter, schedule have to consider, see here.

http://www.josephoat.com/pdf/asapipeschedule.pdf

In plumbing it is the i.d. of the pipe (6")so the diameter is 6". The o.d. is of no consequence. We have to find the amount of water the 6" diameter (i.d.) that is 50' long will contain in order to calculate the proper size container it will require,to be drained without spilling.

Tony

Take more care reading the answer on the calc.

600 x 19.26=14,556 sq.in.

600 x 19.26=11,556 sq.in.

11,556 divided by 231 =

Regards Woody

Thanks Woody I see where my longhand went from 11556 to 14556. Big difference, thanks again.

Tony

Jeez ..What a lot of mistakes....I shouldn't really have to check these simple calcs....but should have noticed!

3.14 x 3 x 3=19.26"

3 x 3 x 3.1416 = 28.27 sq inches

50 x 12 = 600 inches long

600 x 28.27 = 16,962 cubic inches

16,962 divided by 231 = 73.4 gallons

Same as any other cylinder volume

∏ * R² * length.

Hi all you, despite the formula

area= r² * pi

Is the first formula we learn to use , I allways wonder where to find a measuring tool that can , by sure, give me the RADIOUS os a circle.

Not a tape , pencil and paper doing the division diameter by 2 , neither reading a digital caliper , and use a calculator.

I use , since a teacher taught me this one

area= D ² * PI / 4 , and as PI / 4 = 0.785 , i use

area = D² *0.785 , and as I live in a Metric country I relate this number to the Especific weigth of steel 7.85 Kg/dm³

Just a mnemonic formula.

Gabriel , from Argentina

Hi Tonycaudill

The 6" you are using may be nominal or your pipe may be oval or deformed.

It would therefore be better to calculate using measured values.

The volume would then be

Pi * major diam * minor diameter / 4 * length.

iF your deformation is not constant you may have to use some or other method like Simpson's rule to get the real value.

Well, 6in = _{<...tap, tap, tap...>} 0.152m Ø.

The area of this assumed circular pipe = pi/4 multiplied by the diameter squared, which is _{<...tap, tap, tap...>} 0.0182m².

500' = 6000", divided by 39.37 inches per metre, which is _{<...tap, tap, tap...>} 152.4m.

The volume of the pipe is its cross-sectional area multiplied by its length, which is 152.4m x 0.0182m² which is _{<...tap, tap....>} 2.8m³ or 2800 litres _{to 2 sig.fig}.

One could use log tables or even a slide rule, though it won't make any difference.