Answer
$5.5$ feet per minute
Work Step by Step
Given, relevant information: 165 feet traveled in 30 minutes.
The formula for the speed of travel is $r=\frac{d}{t}$.
The distance $d$ is 165 feet, and the time $t$ spent traveling is 30 minutes.
With substitution of these known variables, the average speed will be $\frac{165}{30}$ feet per minute.
The above fraction, when simplified, is equivalent to $\frac{33}{6}$, and $33\div6=5.5$, so the average speed will be exactly 5.5 feet per minute.