Solution:
we are given that
An Area can be washed at a rate of 3100 cm^2/minute.
we have been asked to find how many square inches can be washed per hour?
So here we will have to do the convesrion. As we know that
[tex] 1inche=2.54cm [/tex]
Also we know that [tex] 1 Hr=60 minutes. [/tex]
So substitute these vales as below:
[tex] 3100\frac{cm^2}{minute} =3100\frac{(1/2.54 inches)^2}{1/60 Hr} \\
\\
3100\frac{cm^2}{minute} =3100*(\frac{1}{2.54})^2* 60\frac{Inches^2}{Hr}\\ \\
3100\frac{cm^2}{minute} \approx 28830\frac{Inches^2}{Hr}\\ [/tex]
