. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Practical Dairy Problems 1533 This problem may also be worked by simple proportion: I 125 :: X : 500 25% = I X 500 25^ = 500 jc = 20, number of pounds of 28% cream there will be in the 500-lb. mixture. Answer. If there are 20 lbs. of 28% cream in the 500-lb. mixture, the remainder will necessarily be 3% milk. Therefore, 500 — 20 = 480, number of pou
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Practical Dairy Problems 1533 This problem may also be worked by simple proportion: I 125 :: X : 500 25% = I X 500 25^ = 500 jc = 20, number of pounds of 28% cream there will be in the 500-lb. mixture. Answer. If there are 20 lbs. of 28% cream in the 500-lb. mixture, the remainder will necessarily be 3% milk. Therefore, 500 — 20 = 480, number of pounds of 3% milk. Answer. The number of pounds of 3% milk can be found directly by simple proportion: 24 : 25 :: re : 500 25^1; = 24 X 500 = 12,000 X = 480, number of pounds of 3% milk. Answer. Proof: In working problems in standardization it is always wisest to prove the answer, as this is the best method of checking the work for mis- takes. According to the conditions of the problem there would be 500 lbs. of 4% milk. This amount of milk would contain 20 lbs. of fat (500 X .04 ^20). According to the results the 500 lbs. would be made up of 480 lbs. of 3% milk and 20 lbs. of 28% cream. The 480 lbs. of 3% milk would contain lbs. of fat (480 X .03 = ). The 20 lbs. of 28% cream would contain lbs. of fat (20 X .28 = ). -{- = 20 Since the 500 lbs. contain 20 lbs. of fat, and the materials of which the 500 lbs. is made up furnish the 20 lbs. of fat, the problem is worked cor- rectly. Problem 10: How many pounds of 3-per cent milk must be mixed with 150 pounds of 28-per cent cream to make a mixture testing 4 per cent? In this problem the number of pounds to be made up is not definitely known. Working the problem by the rectangle scheme, we find that i part of 28% cream is ps^ required for 24 parts of 3% milk. According to the terms of the problem, 150 lbs. of 28% cream must be used, and this is 150 times as large as in the above proportion. The 28% cream and
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