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| Q.13 | A and B can do a piece of work in 45 and 40 days, respectively. They began the work together but A left after some days and B finished the remaining work in 23 days. After how many days did A leave? | |
| Ans | 1. 11 days | |
| 2. 9 days | ||
| 3. 10 days | ||
| 4. 12 days |
Correct Ans: 2
