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Re: Adam completes 60% of a task in 15 days and then takes the help of Bob [#permalink]
Lets say Adam completes 30 units in 15 days, so total units = 50 units (30*100/60)
So, A does 2 units / day
B does 1 unit / day
C does 0.5 unit / day

In total 3.5 units / day, so for remaining 20 units they will take - 20/3.5 days which comes to approximately >5 days. Hence C
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Re: Adam completes 60% of a task in 15 days and then takes the help of Bob [#permalink]
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Math Expert
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