Question 790110
This is a repeat question. (x2)

w = width
w(w + 1)(w - 2) = 40
factors of 40: 1, 2, 4, 5, 8, 10, 20, 40
Pick 3 factors of 40 that multiply to 40: 2, 4, 5.
width = w = 4 ft
length = w + 1 = 5 ft
height = w - 2 = 2 ft