Question 1005876
{{{drawing(400,400,-20,20,-20,20,
rectangle(-15,-8,15,8),
rectangle(-11,-4,11,4),
red(line(-15,4,-11,4)),
red(line(-11,8,-11,4)),
red(line(-15,-4,-11,-4)),
red(line(-11,-8,-11,-4)),
red(line(15,4,11,4)),
red(line(11,8,11,4)),
red(line(15,-4,11,-4)),
red(line(11,-8,11,-4)),
locate(-17,0,y),
locate(0,-9,2y)
)}}}


Each red segment is length 2 inches, and the associated square corner would be removed.


Height will be 2 inches;
Base area after folding the flaps up will be  {{{(y-2*2)(2y-2*2)}}};
Volume specified will be  {{{highlight_green(2(y-4)(2y-4)=140)}}}.


You can finish this.  Solve for y.