Question

Jan has 10 reports to file. If each report takes an average of 75 minutes. to file, how long will it take to file 70% of them?

Answer 1

10 × 75 = 750 minutes to file 100% of the files. (Approximately 12.5 hours)

`(70)/(100)` = 0.7

70% of these files = 750 × 0.7 = 525 minutes.

Converting 525 minutes into hours, Jan would to take 8.75 hours to file 70% of the files.

Answer 2

Answer: It will take 525 minutes to file 70% reports.

Explanation:

Average Time taken to file each report ,
`t_1=75\, minutes`

Therefore time taken to file 10 reports ,
`t_(10)=10* t_1`

=>
`t_(10)=10* 75\, minutes=750\, minutes`

To file 70 % reports time taken,
`T=(70)/(100)* t_(10)=(70)/(100)* 750 \, minutes`

=>T = 525 minutes

Thus it will take 525 minutes to file 70% reports.