Question

The Turtle and Achilles compete. They start at the same time from the same place. Achilles runs at a speed of 13 mph while the Turtle moves at a speed of 1 mph. When Achilles reaches the finish line, the Turtle is 2 5 of a mile behind him.

Chapter Reference
Example
a

How much time did the competition take?

Answer 1

2 minutes

Please just trust me.

Answer 2

The first thing you should know in this case is that by definition the distance is equal to the speed for time.
We have then:
d = v * t
Substituting the values:
25 = (13-1) * t
Clearing t:
t = (25) / (13-1) = 2.08 h
answer:
The competition took 2.08h