Efficiency ratio and one worker's time: time working together

1. A.
   2
2. B.
   3
3. C.
   4
4. D.
   5

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1. A.
   $\frac{217}{12}$ days
2. B.
   $\frac{515}{32}$ days
3. C.
   $\frac{215}{12}$ days
4. D.
   $\frac{517}{32}$ days

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1. A.
   10 days
2. B.
   7 days
3. C.
   8 days
4. D.
   9 days

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1. A.
   $3$ minutes
2. B.
   $5$ minutes
3. C.
   $4$ minutes
4. D.
   $6$ minutes

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1. A.
   12 hours
2. B.
   10.8 hours
3. C.
   9.8 hours
4. D.
   10 hours

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