The given triangle is a right angle triangle,
Apply the trignometry ratio of tan
[tex]\tan \emptyset=\frac{Perpendicular}{Base}[/tex]From the given figure we have,
Perpendicular=x and base=72 and angle =40 degree
[tex]\begin{gathered} \tan 40^{\circ}=\frac{x}{72} \\ 0.839=\frac{x}{72} \\ x=0.839\times72 \\ x=60.408 \\ x=60.41 \end{gathered}[/tex]So the value of x is 60.41