Ketan and Kunal can complete a job together in 7 days. Kunal is $$\frac{7}{4}$$ times as efficient as Ketan. In how many days can Kunal alone complete the job?
Kunal is $$\frac{7}{4}$$ times as efficient as Ketan.
Let's assume the efficiency of Ketan is '4y'.
efficiency of Kunal = $$\frac{7}{4}\times4y$$ = 7y
Ketan and Kunal can complete a job together in 7 days.
Total work = total time $$\times$$ efficiency of both of them together
= $$7\times(4y+7y)$$
= $$7\times11y$$
= 77y
Time taken by Kunal alone to complete the job = $$\frac{77y}{7y}$$
= 11 days
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