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1. |
5 skilled workers can build a wall in 20 days: 8 semi-skilled workers can build a wall in 25 days; 10 unskilled workers can build a wall in 30 days. If a team has 2 skilled, 6 semi-skilled and 5 unskilled workers, how long will it take to build the wall? |
A. | 20 |
B. | 10 |
C. | 16 |
D. | 15 |
Answer» E. | |