The shape of suitcase is cubical and volume of cube is the product of its length , width and height.
So,
Volume of suitcase = Length x Width x Height
We know the volume, length and width. Using the above equation we can find the height of the suitcase. Using the values in above equation, we get:
4331.25 = 22.5 x 19.25 x Height
4331.25 = 433.125 x Height
⇒
Height = 10 inches
Thus, the height of suitcase is 10 inches.