Answer :
Let shadow be x
[tex]\\ \sf\longmapsto 5:22=2:x[/tex]
[tex]\\ \sf\longmapsto \dfrac{5}{22}=\dfrac{2}{x}[/tex]
[tex]\\ \sf\longmapsto 5x=44[/tex]
[tex]\\ \sf\longmapsto x\approx 9[/tex]
[tex]5 : 22 = 2 : x[/tex]
[tex]\frac {5}{22} = \frac {2}{x}[/tex]
[tex]5x = 44 [/tex]
[tex]x = 9[/tex]