回複：回複：回複：回複：I think it is answer.

來源: 於 2010-06-18 19:44:07 [舊帖] [給我悄悄話] 本文已被閱讀：次

If you want to all pump are good,the answer is 2.5.
If you only want to get water,2*1/32 +1*12/32=14/32=7/16.