40 ft/min
Explanations:The given measurement is:
8 in / sec
The task is to convert from in/sec to ft/min
Note:
1 inch = 1/12 feet
1 second = 1/60 minutes
Therefore:
[tex]\begin{gathered} 8\text{ in/sec = 8}\times\frac{1}{12}\div\frac{1}{60} \\ 8\text{ in/sec = }\frac{8}{12}\times\frac{60}{1} \\ 8\text{ in/sec = 8 }\times5 \\ 8\text{ in/sec = 40 ft/min} \end{gathered}[/tex]