Solution:
Let efficiency of Q be 2 unit/da
=> Efficiency of P = 2/2 = 1 unit unit/day
=> Efficiency of R = (2 + 1)/2 = 1.5 unit/day
Total work = 1.5 × 40 = 60 units
∴ P, Q and R together can complete the whole work in = 60/(2 + 1 + 1.5) = 60/4.5 = 40/3 days
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90 Mins English English100 Questions100 Marks90 Mins English English40 Questions30 Marks25 Mins EnglishWorking together A, B and C can complete a certain work in 40 days. B and C together can complete thesame work in 60 days. B is 25% more efficient than A. In how many days will C alone complete 40% ofthe same work?
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