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| Q.45 | A can do a piece of work in 9 days and B in 18 days. They began the work together but 3 days before the completion of the work, A leaves. Find the total number to days needed to complete the whole work. | |
| Ans | 1. 9 days | |
| 2. 7 days | ||
| 3. 8 days | ||
| 4. 12 days |
Correct Ans Provided: 3
