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.
How many feet by how many feet equals 1 acre? 43559.45382 ft = 1 acre. square root of 43559.45832 sq ft = 208.73 ft-The U.S. acre is actually an even 43,560 (66x660 or 1/8 mi. by 1/80th).The odd decimal comes from imp â¦ roper use of international feet in a U.S. survey acre. An international acre is 43,560 international feet (exactly 304.8mm each).ow many feet by how many feet equals 1 acre? 43559.45382 ft = 1 acre. square root of 43559.45832 sq ft = 208.73 ft-The U.S. acre is actually an even 43,560 (66x660 or 1/8 mi. by 1/80th).