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1. |
A can complete a piece of work in 20 days and B can complete 20% of the work in 6 days. If they work together in how many days can they finish 50% of the work, if they work together? |
A. | 6 |
B. | 12 |
C. | 8 |
D. | 9 |
Answer» B. 12 | |