# RE1 | openai/gpt-5.6-luna | 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

Total distance:
\[
240+180=420\text{ miles}
\]

Total time:
\[
3+2=5\text{ hours}
\]

Average speed:
\[
\frac{420}{5}=84\text{ miles per hour}
\]

**Answer: 84 mph**
