Tim and Glenn are running laps around a circular track.

[swerve]

Tim and Glenn are running laps around a circular track. If they start at exactly the same time, in how many seconds will Tim have run exactly one lap further than Glenn?

1) Tim runs each lap in 48 seconds and Glenn runs each lap in 60 seconds.
2) The track is 400 meters in circumference.

The OA is A

Source: Veritas Prep

[GMATGuruNY]

Tim and Glenn are running laps around a circular track. If they start at exactly the same time, in how many seconds will Tim have run exactly one lap further than Glenn?

1) Tim runs each lap in 48 seconds and Glenn runs each lap in 60 seconds.
2) The track is 400 meters in circumference.

Statement 1:
The TIME RATIO for Tim and Glenn = 48:60 = 4:5.
Since time and rate have a RECIPROCAL relationship, the RATE RATIO for Tim and Glenn = 5:4.
Implication:
For every 5 laps that Tim runs, Glenn runs only 4 laps.
Thus, after running 5 laps, Tim will have run 1 more lap than Glenn.
At a rate of 48 seconds per lap, the time for Tim to run 5 laps = 48*5 = 240 seconds.
SUFFICIENT.

Statement 2:
No information about the times or rates.
INSUFFICIENT.

The correct answer is A.