GMAT question - Simon and Tim start a race at the same time. Simon c...

Type: Problem Solving

Difficulty: 4 star rating

Simon and Tim start a race at the same time. Simon completes each lap around the racetrack at an average speed of 60mph, and Tim at an average speed of 65mph. How many laps will Simon complete before Tim is a whole lap ahead of him?

20
13
12
10
6