英语翻译A certain company has found that the number of labor hou

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英语翻译
A certain company has found that the number of labor hours required to produce x items is directly proportional to the square root of x.If 3 labor hours are required to produce 20 items,how many labor hours are required to preduce 40 items?
A 3√2 B 6 C 20/√3 D 12 E 3√20
求翻译和讲解

什么情况?凌晨4点起床了?
一公司发现要制造x个零件所需要的工时是与x的平方根成正比的.如果生产20个零件需要3工时,那么生产40个零件需要多少工时?
答：由题目意思,可以设3=k*20的平方根,那么显然k*40的平方根即为生产40个零件所需要的工时.而k*40的平方根即3根号2.

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