Q. P, Q and R alone can complete a work in 12, 15 and 20 days respectively. In how many days will they together complete the same work?
A) 5
B) 4
C) 3.5
D) 6
✔ Correct Answer: 3.5
Exam Insight
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A) 5
B) 4
C) 3.5
D) 6
✔ Correct Answer: 3.5
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