Answer
$96\;mi$.
Work Step by Step
The distance on the map measures $a=3\;in$.
Let the actual distance is $=d$.
Equate the scare drawing ratio with $a:d$.
$\Rightarrow \frac{1}{32}=\frac{3}{d}$
Cross multiply.
$\Rightarrow 1d=32(3)$
Simplify.
$\Rightarrow d=96\;mi$.