Answer:
width = 225 cm ( or 10
cm, according to the diagram)
Step-by-step explanation:
According to the question:
area = length x width
1800 = 8 x width
width = 225 cm
According to the diagram:
area = length x width
1800 = 3w x w
1800 = 3w²
w² = 600
w = 10
cm
If your diagram says that length = 3w, then second method is correct.
Hope this helps.