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 square feet there are in a acre. 1 ftÂ² is 0.000247105 acres. To calculate how to convert square feet to acres you can multiply the number 0.000247105 times. For example, 25 square feet would be 25 x 0.000247105 = 0.006177625 acres. Or you can use our free square feet to acres converter :) 3943 square feet to acres.