Find the perimeter of the 12 m / 85 cm square pool.

1. The perimeter of a square is found by the formula: P = 4 * a, where a is the side of the square. Then we find the perimeter of the pool using this formula:
P = 12 m 85 cm * 4.
To multiply the length of the pool side by 4, translate 12 m 85 cm into cm:
12 m 85 cm = 12 * 100 + 85 = 1200 + 85 = 1285 cm.
P = 1285 * 4,
P = 5140 cm.
2. Let’s translate the length of the perimeter in meters and cm:
5140 = 51 m 40 cm.
Answer: the perimeter of the pool is 51 m 40 cm.