Standard block is basically 8" x 16" which is 128 square inches 128/144=0.8888888888888889. The size of the mortar joints will also have a bearing on the overall wall size.
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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.
1742.40 Square Feet = 1 Gunta 1 Acre= 25 Guntas 1 Gunta = 4 Cents (Decmil) 43560 Sq. Ft. = 1 Acre
1 TON of air conditioning requires 400 cubic feet per minute of air movement in the average HVAC system.
Premixed concrete and cement is usually ordered in quantities referred to as yards. A yard is basically a cubic yard of volume, a three dimensional square box that is 3' x 3' x 3', or 27 square feet. If an area to be poured requires the coverage of 27 square feet with a thickness of 4", then the amount of concrete required would be 1/3 yard.
square foot/feet