10 × 75 = 750 minutes to file 100% of the files. (Approximately 12.5 hours)
[tex]\frac{70}{100}[/tex] = 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: It will take 525 minutes to file 70% reports.
Step-by-step explanation:
Average Time taken to file each report , [tex]t_1=75\, minutes[/tex]
Therefore time taken to file 10 reports , [tex]t_{10}=10\times t_1[/tex]
=>[tex]t_{10}=10\times 75\, minutes=750\, minutes[/tex]
To file 70 % reports time taken, [tex]T=\frac{70}{100}\times t_{10}=\frac{70}{100}\times 750 \, minutes[/tex]
=>T = 525 minutes
Thus it will take 525 minutes to file 70% reports.
