Q. Type 1 workers are 2.5 times as efficient as type 2 workers. Twelve Type 1 workers can complete a task in 10 days. How many days would it have taken 4 Type 1 and 15 Type 2 workers to do the same work?
A) 10
B) 13
C) 11
D) 12
✔ Correct Answer: 11
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