Given:
The efficiency of Monika = 2 × efficiency of Ritu
Concept used:
When work done is same, efficiency ∝ (1/time)
Work = time × efficiency
Solution:
The ratio of efficiency of Monika to Ritu = 2 ∶ 1
The ratio of time taken by Monika and Ritu = 1 ∶ 2
Difference in time taken by Ritu and Monika = 2 - 1 = 1 unit
The difference in time taken by Ritu and Monika = 60 days
1 unit → 60 days
Then, 2 units → 120 days
Time taken by both together to finish the work
English
80 Questions
160 Marks
60 Mins English English20 Questions40 Marks12 Mins English English80 Questions160 Marks60 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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