Question 1204255
The length of the rectangular box is {{{25}}} centimeters less than triple the width. 
{{{L=3W-25}}}.......eq.1

The perimeter of the box is {{{250 }}}centimeters. 

{{{2(L+W)=250}}}.....eq.2

substitute the length from eq.1

{{{2(3W-25+W)=250}}}

{{{6W-50+2W=250}}}

{{{8W=250+50}}}

{{{8W=300}}}

{{{W=300/8}}}

{{{W=37.5}}}

go to

{{{L=3W-25}}}.......eq.1, substitute W

{{{L=3*37.5-25}}}

{{{L=87.5}}}

 the length and width of​ Cleopatra's solid-gold jewelry box is {{{87.5cm}}}