1.

Type 1 workers are two-and-a-half times as efficient as Type 2 workers. If 12 Type 1 workers can complete a task in 10 days, how many days would it take 6 type 1 and 10 type 2 workers to complete the same task?

A. 12
B. 15
C. 14
D. 18
Answer» B. 15


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