5. A square has area 4L² in square metres. Write an expression for:

Question

b. the perimeter in mm.
a. the perimeter in cm.

Answer 1

a. Perimeter in cm:
Since 1 m = 100 cm, the side length of the square in cm would be 2L x 100 = 200L cm.
Therefore, the perimeter in cm would be 4 x 200L = 800L cm.

b. Perimeter in mm:
Since 1 m = 1000 mm, the side length of the square in mm would be 2L x 1000 = 2000L mm.
Therefore, the perimeter in mm would be 4 x 2000L = 8000L mm.