Answer
$\approx214.5\text{ ft}$
Work Step by Step
We know that $\tan{\theta}=\frac{\text{opposite}}{\text{adjacent}}$.
We can denote that $\tan{(25^o)}=\frac{100}{d}$, hence $d=\frac{100}{\tan{(25^o)}}\approx214.5\text{ ft}$
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