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有些工程问题,按常规的思考方法解答较为复杂。如果根据题目特点,巧妙假设,转化过程,变换角度思考,则能化难为易,找出简便的解题方法。例1 一项工作,甲乙两队合做需要6天完成。如果甲队做3天,乙队做4天,共同完成整项工作的(17)/(30)。那么甲队单独做完需要多少天?分析与解法一,甲队做3天,乙队做4天可以假设成甲乙两队共同做3天后,再由乙队做1天,共同完成整项工作的(17)/(30),即可求出乙的工作效率:((17)/(30)-1/6×3)÷1=1/(15),进
Some engineering problems, according to the conventional method of thinking is more complicated. If based on the characteristics of the subject, clever assumptions, transformation process, the transformation point of view, then the difficulty is easy, to find a simple solution to the problem. Example 1 A job, team A and B need 6 days to complete. If team A do 3 days, team B will do 4 days and work together to accomplish (17) / (30). A team to do three days, Team B to do 4 days can be assumed to be A and B two teams together to do 3 days, and then by the team to do 1 day to complete the entire work together (17) / (30), we can get the working efficiency of B: (17) / (30) -1 / 6 × 3) ÷ 1 = 1 / (15)