Problem
The proportions by mass for a concrete mixture are given as follows:
cement = 1
water = 0.53
sand = 2.50
gravel = 3.50
If the unit weight is 2400 kg/m3, compute the cement content.
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.