# Ralph jogs from his home to the stadium at 10km/h. His trip home takes exactly one hour less because he takes a car traveling at 60km/h. How far is it from Ralph's home to the stadium?

Let the distance be x km. By condition $\frac{x}{10} - \frac{x}{60} = 1 \mathmr{and} \frac{5 \cdot x}{60} = 1 \mathmr{and} x = 12$ Km[Ans]