Nirmit can do 2/3 of a job in 18 days. Kashish is twice as efficient as Nirmit. In how many days Kashish will complete the job?
Let total work to be done = 54 units
=> $$(\frac{2}{3})^{rd}$$ of the work = $$\frac{2}{3}\times54=36$$ units
According to ques, Nirmit can do 36 units of work in 18 days,
=> Nirmit's efficiency = $$\frac{36}{18}=2$$ units/day
=> Kashish's efficiency = $$2\times2=4$$ units/day
$$\therefore$$ Time taken by Kashish alone to finish the work = $$\frac{54}{4}=\frac{27}{2}$$ days
=> Ans - (B)
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