The length of rectangular garden = 320 m
The breadth of rectangular garden = 210 m
The distance travelled by Satbir in one round will be equal to the perimeter of rectangular garden.
Perimeter of rectangular garden = 2 (length + breadth)
= 2 (320 m + 210 m)
= 2 (530 m)
= (2 × 530) m
= 1060 m
Hence, Satbir walks a distance of 1060 m every day in one round.