Cement, or Portland cement, is a dry powder made. from limestone and other materials. It is burned in a. kiln and then finely ground. Cement reacts chemically. with water to cause concrete to harden.
There are 43,560 square feet in a acre; this is 4,840 square yards. You can find a conversion calculator at http://www.unitconversion.org/area/acres-to-square-foots-conversion.html Originally, the size of an acre was approximately the amount of land an ox could plow in a day.here are 43,560 square feet in a acre; this is 4,840 square yards. You can find a conversion calculator at http://www.unitconversion.org/area/acres-to-square-foots-conversion.html Originally, the size of an acre was approximately the amount of land an ox could plow in a day.
An acre is defined as one furlong (660 feet) by one chain (66 feet). 1 acre = 43,560 square feet of area. But the area doesn't tell you its shape or dimensions. on converting : 1 sq ft = 2.285 X10-5. 1 acre = 43,560 square feet. An acre is defined as one furlong (660 feet) by one chain (66 feet).1 acre = 43,560 square feet of area<br /><br />But the area doesn't tell you its shape or dimensions.on converting : 1 sq ft = 2.285 X10-5.