This is a question involving the angle of elevation
To obtain the height, h, we can make use of the trigonometric function
Tangent = opposite / adjacent
The opposite angle to 48 degrees is h
The adjacent is 10 ft
[tex]\begin{gathered} \tan \text{ }\theta\text{ =}\frac{opposite}{adjacent} \\ \\ \tan \text{ 48 =}\frac{h}{10} \end{gathered}[/tex]To get h, we can cross multiply
h = 10 x tan 48
h = 10 x 1.11
h = 11.1 ft