Efficiency is inversely proportional to the time taken to complete a work. If the efficiency ratio of P:Q is m:n, then the time ratio for the same work is n:m. Combined work rate is the sum of individual work rates.
Two friends P and Q are employed to do a piece of work in 18 days. If P is twice as efficient as Q, what is the time taken by Q to do the work alone?
Asked in GPSC Prelims CSP 1 2024 · Topic: Industrial Sector (Performance and Trends of Industrial Growth (Contribution to GDP, Employment, Index of Industrial Production))
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