Answer
3.75 kilometers per hour
Work Step by Step
Given, relevant information: 30 kilometers were traveled in 8 minutes.
The formula for speed (represented by the variable $r$) is $r=\frac{d}{t}$
The variable $d$ represents the distance traveled, and the variable $t$ represents the time spent traveling. If we substitute these known variables into the equation, $r=\frac{30}{8}$.
When simplified, this fraction is equivalent to $\frac{15}{4}$, which is equal to $3.75$.
Thus, the train was traveling at an average speed of 3.75 kilometers per hour.
