- A5 days
- B10 days
- C6 days
- D7 1/2 days
Step-by-Step Solution
Pair rates 5, 3, 2 units: twice the total rate is 10, so all three do 5 a day: 6 days.
Answer: C) 6 days
A and B take 6 days, B and C 10 days, and C and A 15 days. Taking the job as 30 units, how long do all three take together?
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