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| 2017/07/04 18:19:29瀏覽135｜回應0｜推薦0 | |
| 標題: quantitative method 急問 發問: The company produces two grades of livestock feed. The grades - nutritious and regular - are produced by refining a blend of two types of raw powder feed - types A and B. Each of them differs not only in cost per barrel, but also in composition. The following table indicates the percentage of... 顯示更多 The company produces two grades of livestock feed. The grades — nutritious and regular — are produced by refining a blend of two types of raw powder feed — types A and B. Each of them differs not only in cost per barrel, but also in composition. The following table indicates the percentage of crucial ingredients of each of the powder feeds and the cost per barrel for each: Type Honey(%) Corn starch(%) Cost per barrel A 40% 55% $35 B 55% 30% $40 Weekly demand for the nutritious grade of feed is at least 2,600 barrels, and demand for the regular grade is at least 3,400 barrels. At least 45% of each barrel of the nutritious grade must be honey. At most 50% of each barrel of regular grade should contain corn starch. The product manager of Knockhill Corporation needs to decide how many barrels of each type of raw powder feed to buy each week for blending to satisfy demand at the minimum cost. Assume that all barrels aforementioned have the same volume. Formulate the linear programming model algebraically for the above problem. (There is no need to solve the model.) 有無人知呢題點做 thx~~ 更新: 請問 A-2B≤0 A-4B≤0 點得黎? 另外呢題唔係要LET 4個未知數咩?? (i.e. A regular, A nutrition, B regular, B nutrition) 希望能再抽空回答 thx~~
此文章來自奇摩知識+如有不便請留言告知 最佳解答:A≧2600 B≧3400 40%A+55%B≧45%(A+B) A-2B≦0 55%A+30%B≦50%(A+B) A-4B≦0 2012-07-12 21:04:18 補充： 我的理解是 ：nutritious and regular是有營養的和普通的，nutritious是A種，regular是B種 A-2B≤0和A-4B≤0是從40%A+55%B≥45%(A+B)和55%A+30%B≤50%(A+B)算出來的 當%是除以100就可以了 2012-07-13 11:06:52 補充： Na+Nb≥2600 Ra+Rb≥3400 Na-2Nb≤0 Ra-4Rb≤0 2012-07-13 11:08:22 補充： 咁似乎喺我錯XD Let A regular, A nutrition, B regular, B nutrition做Ra,Na,Rb,Nb 其他解答: |
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