答案:36 (days).
假設(shè):總?cè)蝿?wù)量為1,team A的工作速度為a/天,team B的工作速度為b/天,則據(jù)題意就有:
18×(a+b)=1
3a+4b=1/5
求解上述方程得到:a=1/45;b=1/30.
當team A獨自完成剩余4/5任務(wù)時,據(jù)題意就有:4/5÷1/45=36 (days).
Two tames need 18 days to complete an engineering taks.Tame A have worked 3 days.Tame B have worked 4days.They have fini
Two tames need 18 days to complete an engineering taks.Tame A have worked 3 days.Tame B have worked 4days.They have finished one fifth of the task.If team A complete the task by them selves they need ( )days.
英語人氣:446 ℃時間:2019-12-01 12:57:55
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