Question

A man who is 60 years old sleeps 8 hours a day . putting together all the 8 hours he slept , how many days ,months or years did he sleep .in his whole life .

Answer 1

$$\begin{gathered} \mathrm{We}\mathrm{know}\mathrm{that}, \\ 1\mathrm{year}=365\mathrm{days} \\ \mathrm{Number}\mathrm{of}\mathrm{hours}\mathrm{man}\mathrm{slept}\mathrm{in}1\mathrm{day}=8\mathrm{hours} \\ \mathrm{Number}\mathrm{of}\mathrm{hours}\mathrm{man}\mathrm{slept}\mathrm{in}365\mathrm{days}=365\times 8=2920\mathrm{hours} \\ \mathrm{So},\mathrm{Number}\mathrm{of}\mathrm{hours}\mathrm{man}\mathrm{slept}\mathrm{in}1\mathrm{year}=2920\mathrm{hours} \\ \mathrm{so},60\mathrm{years}=60\times 2920=175200\mathrm{hours} \\ \mathrm{So},\mathrm{man}\mathrm{slept}\mathrm{for}175200\mathrm{hours}. \end{gathered}$$