Question 912947
D = {{{sqrt(L^2 + w^2 + h^2) = sqrt(48 + 100 + 4) = sqrt(152) = sqrt(9*17) = 3sqrt(17)}}}
Note: Diagonal is from corner to corner
(base diagonal)^2  = l^2 + w^2
D^2 = (l^2 + w^2) + h^2
thus..
D = {{{sqrt(L^2 + w^2 + h^2)}}}