volume in gallons

I think I have the answer, but need to make sure-
How many gallons of water would a copper 1/2 inch pipe that is 1500 feet long hold.
Thanks-

[Robert Fogt]

Assuming the pipe is 1/2 inch in diameter, the cross sectional area would be:

radius = 0.5 / 2 = 0.25
Pi * 0.25 * 0.25 = 0.196 square inches

Now calculate the volume by multiplying area * height.

0.196 square inches * (1500 feet * 12) inches = 3528 cubic inches

Now to gallons.
3528 cubic inch = 15.27 U.S. gallon

You can get a bit more accuracy by using Pi to more decimal places than what I used.

[QUOTE=plumber3;8495]I think I have the answer, but need to make sure-
How many gallons of water would a copper 3/4 pipe 40 ft long hold

Thanks

Plumber 3

[Leopold Plumtree]

[QUOTE=Unregistered;68414]

Originally Posted by plumber3

I think I have the answer, but need to make sure-
How many gallons of water would a copper 3/4 pipe 40 ft long hold

Thanks

Plumber 3

Assuming 3/4 inch diameter...

(3/8)²*pi*40*12, then divided by 231 we get about 0.918 US gallon.

how many gallons in a tank that measures 18 1/2 by 18 1/2 by 12 1/2.?

[JohnS]

Originally Posted by Unregistered

how many gallons in a tank that measures 18 1/2 by 18 1/2 by 12 1/2.?

Assuming the tank is a rectangular solid, 18.5" x 18.5" x 12.5" = 4278 in³
(if corners are rounded, you'll need to subtract a little)

1 gallon = 231 in³ so 4278 in³ x 1 gallon/231 in ³ = 18.5 gallons.