Question 308535
one car takes 2 minutes for one round
So it does 1/2 round in 1 minute
.

second car takes 1 1/2 mins for 1 round  .. (3/2 minutes)

it does 2/3 round in 1 minute

every minute the second car gains 2/3 -1/2 of the round
=4-3 / 6 
=1/6 of the track.

6 minutes iit takes to gain one round of track.

Every 6 minutes the faster car overtakes the slower car.