Machines X and Y work at their respective constant rates.How many more hours does it take machine Y, working alone, to fill a production order of a certain size than it takes machine X, working alone?
(1) Machines X and Y, working together, fill a production order of this size in two-thirds the time that machine X, working alone, does.
(2) Machine Y, working alone, fills a production order of this size in twice the time that machine X, working alone, does 条件1和2是说谁是谁的几倍呀 没有看懂 帮我翻译一下吧 作者: kronorrt 时间: 2011-12-5 06:39
(1) x和y的rate是x的2/3
(2) y rate是x的兩倍作者: 778879147 时间: 2011-12-6 06:31
