How would you solve this problem?

The first and most important series of steps in pursuing an answer to this particular problem is:

1). Obtain a clear printed copy of the problem.

2). Spread the copy in front of you.

3). Look at the entire copy and center it in your field of view.

4). (the climax of these preliminaries): READ the problem, as many times as neccessary to understand what information it gives, and what exactly it asks.

Obviously, we're not equipped to do any of this for you.