CHAPTER IV. 



Problems Relating to the Receiving and Separating 



of Milk. 



55. To find the amount of butter fat in nulk. 



Problem: How many pounds of butter fat are 

 there in 30,000 pounds of milk testing 4 per cent ? 



Rule. Multiply the number of pounds of milk by 

 its test, and divide the result by 100. This will give 

 the number of pounds of butter fat in the milk. 



Solution. 30,000. X4=120,000.: 120,000.-=-100= 

 .1,200. lbs. 



Explanation: Every 100 lbs. of milk contains 4 

 per cent, .04 or 4/100 of butter fat. "When every 

 hundred pounds of milk contains four pounds of 

 butter fat, there will be as many pounds of butter 

 fat in 30,000 lbs. of milk as 100 is contained in 

 (30,000X4) or 1,200 lbs. 



Problems for Practice. 



(1.) How many pounds of butter fat in: 

 8,000 lbs. of milk testing 4 % ? 



Ans. 320. lbs. 

 (2). 10,500 lbs. of milk testing 3.5%? 



Ans. 367.5 lbs. 

 (3). 18,750 lbs. of milk testing 3.9%? 



Ans. 731.25 lbs. 

 (4). 50,000 lbs. of milk testing 3.8%? 



Ans. 1,900 lbs. 

 (5). 100,000 lbs. of milk testing 4.1%? 



Ans. 4,100. lbs. 



273 



