Question 1058680
The square base has an area of x^2, where x is the length and the width (the same, since it is a square)
The height is 4 cm.
The area is x^2*4=100 
x^2=25 cm^2
x=5 cm
The square has area 25 cm^2, and the height is 4 cm.  The area is 100 cm^3.
Both the length and the width are 5 cm.