Alexis can wash a total of 14 windows in 1 hour
Solution:
Given that Alexis washes [tex]10\frac{1}{2}[/tex] windows in [tex]\frac{3}{4}[/tex] hours
To find: number of windows washed in one hour
To simplify the calculations we will convert the given mixed fraction to improper fraction
[tex]\begin{array}{l}{=10 \frac{1}{2}} \\\\ {=\frac{2 \times 10+1}{2}} \\\\ {=\frac{21}{2}=10.5}\end{array}[/tex]
Hence, to wash 10.5 windows, Alexis takes 0.75 hours
Let "n" be the number of windows washed in 1 hour
10.5 windows ⇒ 0.75 hours
"n" windows ⇒ 1 hour
By cross-multiplication we get,
[tex]n \times 0.75 = 10.5 \times 1[/tex]
[tex]n = \frac{10.5}{0.75} \\\\n = 14[/tex]
Thus Alexis can wash 14 windows in one hour
