Explanation:
The corner to OPPOSITE diagonal corner of the box will be 48"
this diagonal is Pythagorean Theorem in 3-D
Diagonal ^2 = 15^2 + 8^2 + height^2
48^2 = 15^2 + 8^2 + height^2
48^2 - 15^2 - 8^2 = height^2
height = 44.89 inches
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