Question
Gagan can do a piece of work in 14 days. Magan is 40%
more efficient than Gagan. How many days will Magan and Gagan together complete the work?Solution
Efficiency of Gagan : Magan 100 : 140 5 : 7 Time taken (reverse) 7 : 5 Actual time taken by Gagan = 14 days. Actual time taken by Magan (2 × 5) = 10 days. required answer = 1/10 + 1/14 = 24/140 days = 35/6 days Alternate Method: Let eff of Gagan = 100 then eff of Magan = 140 Time × Eff = constant 14×100 = T×140 T = 10 days required answer = 1/10 + 1/14 = 24/140 days = 35/6 days
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