Answer:
the height of the box = 4 feet (whole number)Step-by-step explanation:
Let the heigh of the box be h feet.
here
a^2 + b^2 + h^2 = 6^2
3^2 + 4^2 + h^2 = 36
9 + 16 + h^2 = 36
h^2 = 36-25 = 11
h =√11 = 3.316
Therefore the height of the box = 4 feet (whole number)