The ratio of hieght of shadow to the height of individual is same for both individual. So height of shadow for Dr Evil's is,
[tex]\begin{gathered} \frac{h}{6}=\frac{4}{3.5} \\ h=\frac{6\cdot4}{3.5} \\ =6.857 \end{gathered}[/tex]
The shadow of Dr Evil's is 6.857 ft.
