The perimeter of a recatangle is 24 cm. its length is 9 cm. Fing the width

Perimeter (rectangle) = 2 (lenght) + 2 (width)

perimeter=24 cm

lenght = 9 cm

Therefore:

24 cm=2 (9 cm) + 2 width

24 cm=18 cm + 2 width

2 width=24 cm - 18 cm

2 width=6 cm

width=6 cm / 2=3 cm

Answer: width=3 cm.