# RE1 | z-ai/glm-5.2 | run 1

## Prompt

A train travels 240 miles in 3 hours, then 180 miles in 2 hours. What is its average speed for the entire trip? Show your work.

## Response

The train's average speed for the entire trip is \(84\) miles per hour, calculated by dividing the total distance traveled by the total time elapsed.

## Step-by-Step Calculation

**1. Calculate the total distance traveled**
Add the distances of both segments of the trip:
\[ 240 \text{ miles} + 180 \text{ miles} = 420 \text{ miles} \]

**2. Calculate the total time elapsed**
Add the time taken for both segments of the trip:
\[ 3 \text{ hours} + 2 \text{ hours} = 5 \text{ hours} \]

**3. Calculate the average speed**
Divide the total distance by the total time:
\[ \text{Average Speed} = \frac{420 \text{ miles}}{5 \text{ hours}} = 84 \text{ mph} \]

What formula would you use to calculate average velocity if the trip did not occur in a straight line?
