Okay so to find volume of an object, it's "length×height×width/breadth".
Volume= length×height×width
V = l × h × w
In this case, you're sort of going backwards, trying to find the height.
So input the info you have:
10 (2)/(3) = 1 (1)/(3) × 4 × height
Multiply...
10 (2)/(3) = 5 (1)/(3) × h
Move them by using the simple algebra rules
10 (2)/(3) ÷ 5 (1)/(3) = h
2 cubic feet = height