by shill » Wed Jun 29, 2005 6:15 am
I will assume that the bulk density of your sand is 99 lb/ftÂ³. Since you have not given me the units of the area of your sandbox, I will assume feet (ft). Therefore, the capacity of your sandbox will be 4.0 ft * 6.0 ft * 0.5 ft = 12 ftÂ³. 99 lb/ftÂ³ * 12 ftÂ³ = 1 188 lb. Assuming short tons, 1 188 lb * 1 ton/2 000 lb = 0.594 ton (0.6 ton if you assume a maximum of one significant figure from the initial measurements). In conclusion, 1/2 ton will probably not be enough, but 6/10 ton will.