Answer
$\approx20.7\text{ ft}.$
Work Step by Step
We know that $\sin{\theta}=\frac{\text{opposite}}{\text{hypotenuse}}$.
We can denote that $\sin{(70^o)}=\frac{d}{22}$, hence $d=20\sin{(70^o)}\approx20.7\text{ ft}.$
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