Question

英语奥数题

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.

Answer 1

答案：36 (days)。
假设：总任务量为1，team A的工作速度为a/天，team B的工作速度为b/天，则据题意就有：
18×(a+b)=1
3a+4b=1/5
求解上述方程得到：a=1/45；b=1/30。
当team A独自完成剩余4/5任务时，据题意就有：4/5÷1/45=36 (days)。

Answer 2

gkg

Answer 3

生是中国人，死是中国魂，想我看英文，简直不可能@