What is the average speed of a horse that travels east for km in 4 hours?

To find the average speed of the horse, divide the distance traveled by the time taken. If the horse travels a distance of ( x ) kilometers in 4 hours, the average speed would be ( \frac{x \text{ km}}{4 \text{ hours}} ). Therefore, the average speed is ( \frac{x}{4} ) km/h.