Posted: 8/21/2017 7:59:08 PM EDT
| I have a pipe that is 3 feet high and 4 feet in Dia. how many gallons of water will it hold? |
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1 US gallon is 231 cubic inches.
or (231 inch^3)(1 foot/12 inch)^3 to convert to cubic feet. The cross section area is (pi/4)X[Diameter]^2. I have no idea why the radius version of this relation is taught since we more often refer to dimensions as diameters, and it's more complicated. |
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Easy thing to remember when calculating volume of a cylindrical shaped container....
A circle takes up 78.54% of a square. Calculate cubicle feet as you normally would and then multiply by .7854. If you're looking for gals there are 7.4805 gals/cubic foot. So..... Using ID (LxWxH) .7854 x 7.4805 |
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Quoted:
Is that lower real? If so where'd you get it? |
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Quoted:
Easy thing to remember when calculating volume of a cylindrical shaped container.... A circle takes up 78.54% of a square. Calculate cubicle feet as you normally would and then multiply by .7854. If you're looking for gals there are 7.4805 gals/cubic foot. So..... Using ID (LxWxH) .7854 x 7.4805 |
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OP, if you need to do this regularly:
The area of a circle is pi times the radius squared. Â The radius is half the diameter. Â To find the volume of a cylinder, you need to multiply the area by the height. Â Think about this (the volume part; you just have to memorize the area part) for a moment and it should make sense. |
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I'm not sure why everyone is either wrong or harassing.
you have a 4 ft diameter tank that is 3 ft high. the area is 2 ft x 2 ft * Pi = 4 ft^2 * Pi the volume is the area * height = 4 ft^2 * Pi * 3 ft = 12 ft^3 * Pi = 37.6991118431 ft^3 I have no idea what the conversion rate is, but according to google it's equal to 282.0089405405922 gallons |