Question 1158633
height y
bottom, x and x


Most Important:  Be able to form these two equations based on the description.


VOLUME,  {{{x^2*y=18}}}


SURFACE AREA, {{{x^2+4xy=33}}}
(done as, the "outside surface" includes the bottom of the box.)


You can decide what to do next.
You now have two equations in the two unknown variables.  Solve the system!