Xiaoming rides a bike from school to the library, which is 5 kilometers away.
Xiaoming borrows books from the library 5 kilometers away from school by bike. As can be seen from the statistical chart of dotted line given, Xiaoming first arrived at the library for (1/3) hours, then rested for (1/3) hours and then continued to walk for (1/3) hours. The average speed to the library is 5 kilometers per hour, and the speed to the library is every hour.