1742.40 Square Feet = 1 Gunta
1 Acre= 25 Guntas
1 Gunta = 4 Cents (Decmil)
43560 Sq. Ft. = 1 Acre
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Pick a corner, measure 3 feet on one leg, measure 4 feet on the other leg and it should be 5 feet on the diagonal. That means the form is square. Works for a square or rectangle or for an L or complicated layouts. For a square or rectangle you can measure corner to corner and the measurements should be the same.
1 TON of air conditioning requires 400 cubic feet per minute of air movement in the average HVAC system.
It depends on the thickness and the density. One ton should be about 15 cubic feet when compacted, so it would cover 30 square feet 6 inches thick or 45 square feet 4 inches thick or 60 square feet 3 inches thick. It would make a driveway four inches thick, 9 feet wide and 5 feet long or a footpath 3 inches thick, three feet wide and 20 feet long.
It of course depends on the depth. An old rule of thumb is one ton will cover one square yard (3'x3') at 18 inch depth. Of course we don't place it 18 inches deep very often. But if you divide 18 by the number of inches you do plan to lay, it will tell you how many square yards can be covered. For example, at 3" depth, divide 18 by 3 = 6 square yards will be covered. Another way is to calculate the volume you are covering in cubic feet such as 15 feet by 50 feet by 3 inches (0.25'), = total cubic feet. Then divide totl cubic feet by 150 (apprx. wt per cubuc foot of asphalt)=TONS NEEDED
It is a measure of volume usually used when measuring the water in a lake or large reservoir. An acre foot is the amount of water that it would take to cover one acre of land with one foot of water.