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| Q.12 | The ratio of efficiencies of A and B is 3: 7. Working together, they can complete the work in 21 days. They work together for 6 days. In how many days, 70% of the remaining work will be completed by B alone? | |
| Ans | A. 9 | |
| B. 7 | ||
| C. 8 | ||
| D. 10 |
Correct Ans Provided: A
