- A66
- B25
- C85
- D60
Step-by-Step Solution
Apprentice's rate = 1/30 − 1/55 = 11/330 − 6/330 = 5/330 = 1/66 of the job per day, so he needs 66 days.
Answer: A) 66
A plumber and his apprentice together fit the pipes of a new house in 30 days. The plumber alone would take 55 days. How many days would the apprentice take alone?
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