Mathematics · Time and Work
A and B can complete a job together in 12.5 days; B and C can complete the same job together in 18.75 days, while C and A can complete the same job together in 15 days. In how many days will A, B and C together be able to complete the same job alongside D, who is only 40% as efficient a s C?
- 19 1727
- 29 727✓
- 39 23
- 49 13
Correct answer
9 727
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