Question 348317
Let y = height

V = 5 = x^2 * y
y = 5 / x^2

Surface area = a = top + bottom + 4 sides

a = 2x^2 + 4xy
. . . for 5 cubic meters from the volume formula, substute for y

a = 2x^2 + 4x * 5 / x^2
a = 2x^2 + 20x / x^2
a = 2x^2 + 20 / x

a (x) = 2x^2 + 20 / x <===