Question
Ratio of the efficiency of 'A', 'B' and 'C' is 4:5:2,
respectively. 'A' and 'B' complete the work together in 20 days. Find the time taken by 'B' and 'C' to complete the work together. (Answer should be rounded off to the nearest integer)Solution
Let the efficiency of 'A', 'B' and 'C' be '4n', '5n' and '2n' units/day, respectively.
Total work = (4n + 5n) X 20 = '180n' units
Required time = 180n ÷ (5n + 2n) = (180/7) ~ 26 days
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