Answer:
The height of box A is 18 units.
Step-by-step explanation:
The volume of box B = 576 cubic units
The base area = 48 square units.
The height of box B = 12 units.
Given that the height of box B is 2/3 the height of box A.
Let the height of box A = H.
The height of box A is 18 units.