A can complete a job in 12 days and B in 6 days. Working together, in how many days will they complete it?
Answer and explanation
Correct answer: A. 4 days
- Step 1: Per-day work of A and B: 1/12 + 1/6 = 1/4.
- Step 2: Time together = 4 days.
Answer
4 days.
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