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If P and Q together can complete a job in 20 days ; Q and R together in 30 days ; and R and P together in 24 days, then P, Q and R together can complete the same job in :
Correct Answer: (b)
Official keyThis question appeared in the NPSC Prelims 2019 examination (GS). It is Question 42 out of 200 questions in this paper.
This question was part of the NPSC Prelims 2019 (GS). The NPSC Prelims examination tests candidates on general studies, current affairs, and aptitude through multiple-choice questions.
Practice previous year questions from all NPSC Prelims papers and compare patterns with UPSC Prelims PYQ to identify overlapping topics.