Find the value of x if the right prism has a volume of 24 m^3

Without any indication of how ##x## relates to the right prism, this question can not be answered.

Based on the diagram I assume the "right prism" is a triangular right prism.

In this case if the sides of the triangular surface are ##a,b, and c## and the height of the prism is ##h## then the volume of the prism would be: ##color(white)("XXX")"Volume"=24m^3=hxx"Area"_triangle## ##color(white)("XXX")##where ##"Area"_triangle = sqrt(s(s-a)(s-b)(s-c))## with ##s=(a+b+c)/2##

If ##x## is one of ##a, b, c, h## and the other 3 values are given, we could plug the values into this relation to determine the value of ##x##