Answer:
Volume = length x width x height
Substituting the given values, we get:
220.5 cm^3 = 7 cm x width x 7 cm
Simplifying and solving for the width, we get:
220.5 cm^3 = 49 cm^2 x width
width = 220.5 cm^3 / 49 cm^2
width = 4.5 cm (rounded to one decimal place)
Therefore, the width of the shape is 4.5 cm.