Question

Working 8 hours a day, Ashu can copy a book in 18 days. How many hours a day should he work so as to finish the work in 12 days?

Answer 1

$$\begin{gathered} \mathrm{If}\mathrm{Ashu}\mathrm{works}\mathrm{for}8\mathrm{hours}\mathrm{daily},\mathrm{he}\mathrm{can}\mathrm{finish}\mathrm{the}\mathrm{work}\mathrm{in}18\mathrm{days}. \\ \mathrm{If}\mathrm{he}\mathrm{works}\mathrm{for}1\mathrm{hour}\mathrm{daily},\mathrm{he}\mathrm{can}\mathrm{finish}\mathrm{the}\mathrm{work}\mathrm{in}\left(18\times 8\right)\mathrm{days}\mathrm{or}144\mathrm{days}. \\ \therefore \mathrm{Number}\mathrm{of}\mathrm{hours}\mathrm{he}\mathrm{should}\mathrm{work}\mathrm{daily}\mathrm{to}\mathrm{finish}\mathrm{the}\mathrm{work}\mathrm{in}12\mathrm{days}=\frac{144}{12}=12 \end{gathered}$$