Question

If an area can be washed at a rate of 3100 cm 2/minute , how many square inches can be washed per hour? Use the table of equivalent measures on page 15. Write your answer with the correct number of significant digits.

Answer 1

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

`1inche=2.54cm`

Also we know that
`1 Hr=60 minutes.`

So substitute these vales as below:

`3100(cm^2)/(minute) =3100((1/2.54 inches)^2)/(1/60 Hr) \\ \\ 3100(cm^2)/(minute) =3100*((1)/(2.54))^2* 60(Inches^2)/(Hr)\\  \\ 3100(cm^2)/(minute) \approx 28830(Inches^2)/(Hr)\\`