Answer
$33.7$ feet
Work Step by Step
We can use the tangent of the triangle to solve for the angle.
Since, $\tan \theta= \dfrac{Opposite}{Adjacent}$
$\tan 31.7^{\circ}= \dfrac{h_1}{125} \implies h_1 =77.20 feet $
and $\tan 19.2^{\circ}= \dfrac{h_1}{125} \implies h_1=43.53 feet $
Simplify after subtracting the difference:
$ h_1=77.20-43.53 \approx 33.7$ feet
