The volume of every of the 25 cylindrical containers is 235,500/25 = 9,420 in^3
The formula for the volume of a cylinder is:
V = π(r^2).h
Where π=3.14, r = 2.5 in, V = 9,420 in^3, so you can obtain h as:
h = V / (πr^2) = 9,420 / [(3.14) (2.5^2)] = 480 in