How much water will a 3/4 inch by 100 feet pipe hold?



Answer:
0.306915 cubic feet
3/4 inch is assumed as inner dia of pipe

3/4 x 3/4 x 22/7 x 1/4 x 1/144 x100 = 0.306915 cft.
as much as it can hold
The formula for the volume of a cylinder is pi.r^2.h, I don't have time right now to do the sums, but remember to use consistent units.
well, this is where we need to find the capacity of the pipe. First we start with the area of the pipe's end.
The pipe has a diameter of 3/4 inches, which gives a radius of .37 inches. We use the formula: pi x r ^2

3.141592 x (.37x.37) = .40 square inches.

Now we multiply this area by the pipe's lengh, which will give us the volume and/or cubic capacity.

.40 sq. inches x 1200 inches (converted from 100ft)

= 480 cubic inches of water. If you want to convert this to cubic feet, divide by 1728, because that is the number of cubic inches in each cubic foot. 480 cubic inches is .27 cubic feet of water.
Assumption:
Your dimensions are the inside measurements of the pipe.
The 3/4 inch is the diameter of the pipe, not the radius.
The answer must be in fluid measurements, not volume.

Okay, first of all you need to find the volume of the pipe. That's easy--the pipe is a cylinder, and the formula for that is:

V = (pi)(r^2)(l)

Just to note, the r^2 means "radius squared".

pi = 3.14
r = radius = (1/2 of 3/4 inch) = 3/8 inch = .375 inch
l = length = 100 feet = 1200 inches

V = (3.14)(.375^2)(1200)
V = 529.875 cubic inches.

However, you might need to quote this answer in fluid volume; so you need to find a conversion factor:

There are 231 cubic inches per gallon, so the conversion factor is:
(1 gallon) / (231 in^3)

So, in order to convert from cubic inches to gallons:
529.875 in^3 * (1 gallon)/(231 in^3)
Cancel the cubic inches and combine the fraction...
= (529.875) / (231) gallons
Do the arithmetic...
= 2.294 gallons

If you need the answer in fluid ounces, there are 128 fluid ounces per gallon, and you can use a similar procedure as the above conversion to find the final answer:

293.61 fl. oz.
Steel pipe Schedule 40 = 2.768 gallons(US)
Steel pipe Scheldule 80 = 2.25 gallons(US)
Copper tubing Type M = 2.685 gallons(US)
3.860875 litres approx.or 1.019989 gal approx
Volume, V = (pi)d^2l/4, where d = diametre and l = length
V = (pi) [(3/4/12)^2]/4 (100) ft^3
If you want in pounds,
m = V x 62.4 lbs [1 ft^3 of water = 62.4 lbs]

Appx 19 pounds

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