- A15 days
- B12 days
- C10 days
- D18 days
Step-by-Step Solution
Let the job take days: A works , B works , so .
Answer: A) 15 days
A can do a job in 20 days, B in 30 days. They work together, but A leaves 5 days before the job ends. How many days does the job take?
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