Answer:
20/9 laps
Explanation:
convert everything to minutes to make things a little easier
3/10 of an hour = 1/10 of an hour (6 minutes) * 3 = 18 minutes
2/3 of an hour = 1/3 of an hour (20 minutes) * 2 = 40 minutes
18 minutes = 1 lap
40 minutes = ? laps
multiply the first equation by 40/18 to get 40 minutes on the left sides
40 minutes = 40/18 laps = 20/9 laps