题目内容
一项工程，乙队单独做要8天完成，甲队单独做要10天，现在两队合做，多少天能完成这项工程的
？
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 8 |
| 1 |
| 10 |
=
| 3 |
| 4 |
| 5 |
| 40 |
| 4 |
| 40 |
=
| 3 |
| 4 |
| 9 |
| 40 |
=
| 3 |
| 4 |
| 40 |
| 9 |
=
| 10 |
| 3 |
答：
| 10 |
| 3 |
| 3 |
| 4 |
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| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 8 |
| 1 |
| 10 |
| 3 |
| 4 |
| 5 |
| 40 |
| 4 |
| 40 |
| 3 |
| 4 |
| 9 |
| 40 |
| 3 |
| 4 |
| 40 |
| 9 |
| 10 |
| 3 |
| 10 |
| 3 |
| 3 |
| 4 |
阅读快车系列答案