That depends on the size of the gravel and how thick a layer you want to end up with.
104 square feet = 9.66192 square meters.
108 square feet = 12 square yards.
how may yards of concrete are needed for a floor 24 x 25 feet?
Multiply the two dimensions to get the area. The calculation will give you 54 square feet.
If it's really square you should need 156 18" tiles to cover 350 square feet. Most tile stores let you return unused tiles, so I suggest you get a few extra. The number needed can change based on the grout space, how many you break and if the area isn't square you may need more. A rule of thumb is to add 10% for waste. That rule would say to buy about 175.
If the 6x12 tiles are in inches, it will take two of them to cover a square foot. You will need 210 of them.
If your drum is a 55 gallon drum and your paint can cover 400 square feet per gallon then you may cover (one coat only) a square almost 150 by 150 feet.
The question as stated makes no sense, as square feet is a measure of area and "yard", is a measurement of volume. Normally, "yard" is a measurement of length. However, concrete, soil, gravel, sand, etc., are normally sold (in the U.S.) by the "yard" which is simply short for "cubic yard." However, you may easily calculate the area that a yard of crushed rock will cover, depending on the desired depth of crushed rock. As a cubic yard is 3 feet by 3 feet by 3 feet, which is equivalent to 9 square feet by 36 inches, simply divide 36 inches by the desired depth in inches, and multiply it by 9 square feet. Thus, if you wanted a depth of 8 inches, 36 divided by 8 is 4.5. So, you can cover 4.5 square yards, or 4.5 times 9 square feet = 40.5 square feet, which would be a square area approximately 6 feet 4 inches by 6 feet 4 inches.
The units may be any squared units. It is an area. They may be square inches, feet, yards, miles, metres, kilometres etc.
A square can be built to cover as many or as few square feet as you want it to cover. This may be one reason that squares have the reputation of being so useful and elegant. If one day you should happen upon a square, and you wish to learn how many square feet it covers, simply measure one side, express the length in feet, multiply that number by itself, and the result is the number you seek. If you wish to build a square that covers the number of square feet that you choose, simply calculate the square root of that number, or ask a knowledgeable expert to calculate it for you, and build a square whose sides all have a length equal to the number that was calculated.
1440 square feet
1 square mile = 27,878,400 square feet.
104 square feet = 9.66192 square meters.
94 square meters is 1,011.81 square feet.
108 square feet = 12 square yards.
how may yards of concrete are needed for a floor 24 x 25 feet?
40 m2 = 430.556 square feet.