Multiple choice

P can do a piece of work in 60 days and Q can do the same work in 50 days. Find the ratio of working efficiency of P to Q.

  1. 1 : 3

  2. 6 : 5

  3. 5 : 6

  4. 4 : 5

  5. NA
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C Correct answer
Explanation

Efficiency is inversely proportional to time. Ratio of time P:Q = 60:50 = 6:5. Ratio of efficiency P:Q = 5:6.

AI explanation

Efficiency is inversely proportional to the time taken to complete a task. Because P takes 60 days and Q takes 50 days for the same work, their efficiencies are calculated as the inverse of their times. The ratio of their efficiencies is 1/60 to 1/50, which is determined by cross-multiplying to get 50 to 60. Simplifying this ratio gives 5 to 6. The result is 5 : 6.

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