Answer:
109 inch
Step-by-step explanation:
we know that
[tex]tan\theta=\frac{Perp}{Base} \\\theta=70\\Base=40 in[/tex]
So,
[tex]tan(70)=\frac{Perp}{40} \\\\2.747=\frac{Perp}{40} \\\\2.747\times40=Perp\\\\Perp=109\quad in[/tex]
So, length of lamppost is 109 inch
