Two possible answers:
A linear foot is the length of a line and has one dimension: it has no width, so the area to cover is 1621 ft x 0 ft = 0 sq ft which means no paint will be required.
Alternatively, a one dimension thing can be considered to have infinite width, so the area to cover is 1621 ft x ∞ ft = ∞ ft, ie you'll need an infinite amount of paint to paint it.
A linear foot is a measure of length of a line with no width. To paint a line, a width for the line needs to be specified. Also, the depth of the painted line is required as a volume of paint will be deposited.
So the amount of paint required is 1621 ft x width of line x depth of paint. This would then need to be converted into gallons; where you are will affect this conversion as it will affect the size of gallon you use:
In UK, 1 cu ft ≈ 6.229 imp gallons
In US, 1 cu ft ≈ 7.481 US gallons
For example, if you wanted to paint the 11" wide white line that separates a Bus Lane from the other lanes on a UK road with paint 1/10 inch thick you would require:
12 in = 1 ft
volume = 1621 ft x 11 ÷ 12 ft x 1/10 ÷ 12 ft ≈ 12.382 cu ft ≈ 12.382 x 6.229 imp gallons ≈ 77.13 [imp] gallons.
It depends on the coverage of the paint which, in turn, depends on the porosity and preparation of the surface being painted.
Whatever it says on the tin
There are linear feet, and square feet, but no "linear square feet".
72 feet is already linear as feet is linear so answer is 72
Feet and linear feet are the same measurement. Therefore, 500 linear feet is equal to 500 feet.
Just over 20 gallons
400 Square Feet.
(6-ft x 172-ft) / (200 square feet per gallon) = 5.16 gallons
a gallon of interior paint covers on average 400 square feet. you need to figure how many square feet of wall space you have to determine how many gallons you will need.
750 sq ft = 2 g 750/2=375 1000/375=2.666667 you will need 2.67 gallons of paint. Buy 3 gallons & you will have some leftover for touchups.
about 4 gallons for one coat for smooth surface; about 6 gallons if the surface is rough
you spay 10 feet away and use 50 gallons of paint for a bathroom :)
390 linear feet of wall space (150+45+150+45) 3900 Square feet of wall space (390x10) 3900/400=10 gallons for ONE coat However 400sqft per gallon is a bit optimistic; add 10% 11 gallons