# RE1 | x-ai/grok-4.3 | 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. This value comes from dividing the combined distance traveled by the total elapsed time.

Total distance equals 240 miles plus 180 miles, or 420 miles.  
Total time equals 3 hours plus 2 hours, or 5 hours.  
Average speed is therefore given by  
\[ \frac{420}{5} = 84 \]  
miles per hour.

What speed would result if the same distances were covered in half the time?
