Answer: 62.50 Cubic Units (NOT 30)
Explanation:
each side of a box is s = 2.5 units
volume of one box is length * width * height
since its a cube all sides are equal
volume of one box = s³ = 2.5³
since there are 4 boxes,
total volume V = 4s³
V = 4 * 2.5³ = 4 * 15.625
= 62.50