Racer A runs 15 miles an hour, and she needs to travel 5 miles to get to racer B and hand off her racing baton. Racer B will then run 5 miles an hour faster than racer A, and travel 4 times as far. That’s the whole race. We want to know how long the whole race will take, but first we have to know: how long it will take racer A to complete her part of the race? (An hour is 60 minutes)
