Question
Karan can do 60% of a job in 36 days while Meena does 20%
in 18 days. Karan works for 20 days and stops. Calculate how many days Meena will take to complete the rest of the work.Solution
ATQ,
Time taken by Karan to complete whole work = (36 / 0.60) = 60 days
Time taken by Meena to complete whole work = (18 / 0.20) = 90 days
Let the total work be 180 units (LCM of 60 and 90)
Efficiency of Karan = (180 / 60) = 3 units/day
Efficiency of Meena = (180 / 90) = 2 units/day
Work completed by Karan in 20 days = 20 × 3 = 60 units
Remaining work = 180 - 60 = 120 units
Therefore, required time = (120 / 2) = 60 days
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