If Sibi takes three rounds of a square garden with a side length of 60 meters, the distance she travels is equal to the perimeter of the square multiplied by the number of rounds.
The perimeter of a square with a side length of 60 meters is:
4 x 60m = 240m
Therefore, the distance Sibi travels in one round is 240 meters, and for three rounds, she would travel:
240m x 3 = 720m
So, Sibi travels a distance of 720 meters if she takes three rounds of a square garden with a side length of 60 meters.