Answer:

Explanation:
We know that the formula for the distance is:

Where "V" is speed and "t" is time.
Let be:
: time of her trip from her home to the library.
: time of her trip from the library to her home.
: speed on her trip from her home to the library.
: speed on her trip from the library to her home
We can identify that:

Since the distance she rode on the both trips are equal:
Solving for
, we get:

Therefore, the distance for her home to the library is:
