Question 702665
The question is partly wrong because the dimensions may not be in proportion between the two boxes, so they may be dissimilar.


If one would ignore the dissimilarity, then the first box has dimensions w, L, and h for width, length, and heigth in that order.  Volume is whL.


The second box has dimensions 3w, 2L, and h.  Volume of this second box is 3wh2L, 
or volume of 6whL.


{{{V[1]=whL=200}}}
{{{V[2]=6whL}}}
{{{V[2]=6*200}}}   by substitution


Volume of the second box is 1200 cubic inches.