FARM AND SCHOOL PROBLEMS. 



PROBLEMS. 



1. If 2 bags of cement, 3J cu. ft. of sand and 7! cu. ft. of 

 stone are required to build &| cu. ft. of concrete, how many cu. 

 ft. of sand will be required to build a concrete wall 40 ft. long, 

 2 ft. thick, and 8 ft. high ? 



2. Eighty bags of cement were used in building a wall of 

 1:2^:5 concrete mixture; how many cu. ft. of sand and stone 

 each were required for the job? 



NOTE Read Table i carefully. 



TABLE II. 



QUANTITY OF MATERIALS IN I CU. FT. OF CONCRETE. 



PROBLEMS. 



1. How many barrels of cement, and cubic yards each of sand and 

 stone or gravel will be required to build a silo, of which 750 cu. ft. are to 

 be 1:2:4 concrete, and 185 cu. ft. are to be 1:2^:5 concrete? 



2. If 1 cu. ft. of 1:1 mixture of sand and cement, will paint 15 

 sq. yds. of surface, and requires 0.1856 barrel of cement and 0.0263 cu. 

 yds. of sand, what will be required (In quantities of sand and cement) to 

 paint the silo if there are 400 sq yards of surface? 



3. Make an estimate of the cost of this silo, at the present price of 

 cement, sand, stone and labor. 



Send for the following bulletins : 



"Concrete in the Country", Universal Portland Cement Co., 72 W. 

 Adams St., Chicago, 111. 



Farmers' Bulletin, No. 461, U. S. Department of Agriculture, Wash- 

 ington, D. C. 



The Silo. 



The silo has come into general use throughout the United 

 States within the last thirty years and has reached its greatest 

 development in those regions especially adapted to dairying. 



