Question

An elf can make 15 presents In 1 and ½ hours. How many presents can he make in 8 hours of work?

Answer 1

Given:

An elf makes 15 present in 1 hour and 30 minutes, that is 90 minutes.

The time taken to make one present by the elf is,

`\begin{gathered} \text{Time for one present =}\frac{90\text{ min}}{15} \\ =6\text{minutes} \end{gathered}`

The time taken to make 8 presnt is,

`\begin{gathered} \text{Time taken for 8 present=8}*(Timetaken\text{ for one present)} \\ =8*6 \\ =48\text{ minuts} \\ =(48)/(60)\text{ hour} \\ =0.8\text{ hour} \end{gathered}`

Thus, the time taken by an elf to make 8 present is 0.8 hours.