mathes 1題
2008-05-12 6:59 pm
已知一罐重500g的奶粉之價值為$7m,一罐重400g的咖啡粉之價值為$5c,一盒50粒裝的方糖之價值為$10s.沖調一杯咖啡需要20g奶粉.30g咖啡粉及3粒方糖,求每杯咖啡的成本
回答 (1)
2008-05-12 10:07 pm
✔ 最佳答案
[7m(20)]/500 + [5c(30)]/400 + [10s(3)]/50= 7m/25 + 3c/8 + 3s/5
= (56m+75c+120s)/200
希望岩啦
點解會有咁多UNKNOWN = =
真係唔明
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080512000051KK00790